An immersed liquid-cooled battery energy storage system

Abstract

The utility model discloses an immersed liquid cooling battery energy storage system belongs to energy storage system technical field. The immersed liquid cooling battery energy storage system includes the stand, refrigerating unit, liquid inlet pipe, liquid return pipe, battery pack interval connecting pipe and a plurality of battery packs, a plurality of battery packs are arranged on the stand, one end of liquid inlet pipe is connected with the first liquid outlet of refrigerating unit, and the second liquid inlet of battery pack on the top is connected with the other end of liquid inlet pipe, and the liquid inlet and outlet of a plurality of battery packs are connected in proper order through battery pack interval connecting pipe, and the second liquid outlet of bottom battery pack is connected with the first liquid return of refrigerating unit through liquid return pipe. The utility model discloses through the series connection of refrigerating unit and the series connection of a plurality of battery packs that are connected in series up and down, sets up the temperature and flow of refrigerating unit adjustment coolant, to realize all -round cooling of battery pack, improves the heat dissipation efficiency and safety reliability.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage system technology, and in particular relates to an immersion liquid-cooled battery energy storage system. Background Technology

[0002] Immersion liquid cooling is a heat dissipation method for lithium battery energy storage systems, differing from traditional air cooling or plate-type liquid cooling. In immersion liquid cooling, the lithium battery and other hardware are completely or partially submerged in a specially formulated coolant. The coolant circulates to remove heat, which is then transferred to the external environment through heat exchange modules. Compared to traditional cooling methods, immersion liquid cooling provides more efficient heat dissipation while ensuring the safe operation of the system. Summary of the Invention

[0003] This utility model provides an immersion liquid-cooled battery energy storage system, which aims to solve the problem of low heat dissipation efficiency in traditional air-cooled or plate-type liquid-cooled heat dissipation methods.

[0004] The present invention is implemented as follows:

[0005] An immersion liquid-cooled battery energy storage system includes a shelf, a refrigeration unit, an inlet pipe, a return pipe, a battery pack inter-connection pipe, and several battery packs; the battery packs are arranged vertically on the shelf; one end of the inlet pipe is connected to the first outlet of the refrigeration unit, and the other end of the inlet pipe is connected to the second inlet of the top battery pack; the inlets and outlets of the battery packs are connected in series through the battery pack inter-connection pipes, and the second outlet of the bottom battery pack is connected to the first return port of the refrigeration unit through the return pipe.

[0006] Preferably, the liquid inlet and outlet are located between the second liquid outlet of the upper battery pack and the second liquid inlet of the lower battery pack.

[0007] Preferably, the refrigeration unit, the liquid inlet pipe, the liquid return pipe, and the battery pack are respectively disposed in the shelf.

[0008] In a preferred embodiment, several battery packs are arranged vertically on the shelf, and the inlet and outlet ports of the battery packs are connected in series via the battery pack connecting pipes. During operation, coolant is transferred from the upper battery pack to the lower battery pack through the battery pack connecting pipes.

[0009] In a preferred embodiment, within the same battery pack, the horizontal height of the second inlet is lower than the horizontal height of the second outlet. During operation, after the coolant enters through the second inlet and reaches the height of the second outlet, it can flow out from the second outlet.

[0010] This invention achieves comprehensive cooling of the battery pack by setting up a refrigeration unit to regulate the temperature and flow rate of the coolant, thereby ensuring heat dissipation effect, improving heat dissipation efficiency, and enhancing the safety and reliability of the energy storage system.

[0011] In a further preferred embodiment, during normal operation of the refrigeration unit, the refrigeration unit pumps coolant into the top battery pack through the second inlet, immersing the battery modules inside the battery pack to achieve immersion cooling. When the coolant level reaches the plane of the second outlet, the coolant flows out from the second outlet, passes through the connecting pipe between battery packs, and enters the second inlet of the next battery pack. Then, it sequentially enters the following battery packs and flows back to the refrigeration unit through the second outlet of the bottom battery pack via the return pipe. The refrigeration unit cools the coolant and then pumps it back into the first battery pack for circulating cooling.

[0012] In a preferred embodiment, the refrigeration unit is disposed below the battery pack at the bottom.

[0013] In a preferred embodiment, during normal operation, the coolant level is level with the horizontal plane where the second outlet is located. That is, during normal operation, the coolant in the battery pack is a partial coolant.

[0014] In a preferred embodiment, before operation, a portion of coolant is placed inside the battery pack, with the second inlet submerged in the coolant and the second outlet above the coolant level in the battery pack. During the circulation of the liquid cooling system, the refrigeration unit pumps the coolant from the first outlet into the second inlet of the top battery pack. When the coolant level rises to the level of the second outlet, the coolant flows from the second outlet to the next battery pack. The coolant flows sequentially from top to bottom into the bottommost battery pack and returns from the second outlet of the bottommost battery pack to the first return outlet of the refrigeration unit, completing a single circulation of the coolant.

[0015] More preferably, the immersion liquid-cooled battery energy storage system further includes an inlet and outlet adjustment component, which is arranged correspondingly to the plane where the second liquid outlet and the second liquid inlet of the battery pack are located.

[0016] More preferably, the inlet / outlet adjustment assembly includes an assembly support, a first adjustment tube, and a second adjustment tube; the assembly support is provided with an outlet liquid port and an inlet liquid port; the two ends of the first adjustment tube are respectively connected to the second inlet liquid port and the inlet liquid port, and the two ends of the second adjustment tube are respectively connected to the second outlet liquid port and the outlet liquid port. By adjusting the connection of the first and second adjustment tubes of the inlet / outlet adjustment assembly, the outlet positions of the original second outlet liquid port and second inlet liquid port on the battery pack can be adjusted, facilitating the layout and connection of the connecting pipes between battery packs. In this embodiment, after adjustment by the inlet / outlet adjustment assembly, the outlet liquid port and the inlet liquid port replace the original second outlet liquid port and second inlet liquid port in the connection with the inlet pipe, return pipe, and connecting pipes between battery packs.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention connects a refrigeration unit in series with several battery packs connected vertically. The battery packs contain a portion of coolant, and the refrigeration unit regulates the temperature and flow rate of the coolant. This achieves comprehensive cooling of the battery packs, ensuring heat dissipation, improving heat dissipation efficiency, and enhancing the safety and reliability of the energy storage system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the submerged liquid-cooled battery energy storage system in Example 1;

[0020] Figure 2 This is a side view of the battery pack and its liquid level in Example 1;

[0021] Figure 3 This is a side view of the battery pack and its liquid level in Example 1;

[0022] Figure 4 This is a schematic diagram of the pipeline layout principle of the immersion liquid-cooled battery energy storage system in Example 1;

[0023] Figure 5 This is a top view of the battery pack (after the top cover is hidden) in Example 2;

[0024] Figure 6 This is a side view of the battery pack and its liquid level in Example 2;

[0025] Figure 7 This is a perspective structural diagram of the battery pack in Example 2;

[0026] Figure 8 This is a schematic diagram of the submersible liquid-cooled battery energy storage system in Example 2;

[0027] In the figure, A represents the coolant level. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] Currently, traditional air-cooling or plate-type liquid cooling methods suffer from low heat dissipation efficiency. To address these technical problems, this invention proposes an immersion liquid-cooled battery energy storage system.

[0034] Example 1

[0035] like Figures 1 to 4 As shown, an immersion liquid-cooled battery energy storage system includes a shelf 1, a refrigeration unit 2, an inlet pipe 3, a return pipe 4, a battery pack inter-connection pipe 5, and several battery packs 6.

[0036] Several battery packs 6 are arranged vertically on the shelf 1; one end of the liquid inlet pipe 3 is connected to the first liquid outlet 21 of the refrigeration unit 2, and the other end of the liquid inlet pipe 3 is connected to the battery pack 6 at the top. Figure 1 The second liquid inlet 62 of the first battery pack at the top of the middle is connected; a plurality of the battery packs 6 ( Figure 1 The inlet and outlet ports of the first to fifth battery packs are connected in series via the battery pack connecting pipe 5, and the bottom battery pack 6 ( Figure 1 The second liquid outlet 61 of the fifth battery pack is connected to the first liquid return port 22 of the refrigeration unit 2 through the liquid return pipe 4.

[0037] The liquid inlet and outlet are located between the second liquid outlet 61 of the upper battery pack 6 and the second liquid inlet 62 of the lower battery pack 6.

[0038] Preferably, the refrigeration unit 2, the liquid inlet pipe 3, the liquid return pipe 4, and the battery pack 6 are respectively disposed in the shelf 1.

[0039] In a preferred embodiment, a plurality of battery packs 6 are arranged vertically on the shelf 1, and the inlet and outlet ports of the plurality of battery packs 6 are connected in series through the battery pack connecting pipe 5. During operation, coolant is transferred from the upper battery pack 6 to the lower battery pack 6 through the battery pack connecting pipe 5.

[0040] In a preferred embodiment, within the same battery pack 6, the horizontal height of the second inlet 62 is lower than the horizontal height of the second outlet 61. During operation, after the coolant enters the same battery pack 6 through the second inlet 62, it reaches the height of the second outlet 61 and then flows out through the second outlet 61.

[0041] More preferably, during normal operation of the refrigeration unit 2, the refrigeration unit 2 pumps coolant into the top battery pack 6 (first battery pack) through the second inlet 62, immersing the battery modules inside the battery pack to achieve immersion cooling. When the coolant level A reaches the plane of the second outlet 61, the coolant flows out from the second outlet 61, passes through the battery pack connecting pipe 5, and enters the second inlet 62 of the next battery pack 6 (second battery pack), and then sequentially enters the following battery packs 6, from the bottom battery pack 6 (… Figure 1 The coolant is returned to the refrigeration unit 2 via the return pipe 4 through the second outlet 61 of the fifth battery pack. The refrigeration unit 2 cools the coolant and then pumps it back into the first battery pack for circulating cooling.

[0042] In a preferred embodiment, the refrigeration unit 2 is disposed below the battery pack 6 at the bottom.

[0043] In a preferred embodiment, during normal operation, the coolant level A is level with the horizontal plane where the second outlet 61 is located.

[0044] In a preferred embodiment, before operation, a portion of coolant is placed inside the battery pack 6, with the second inlet 62 submerged in the coolant and the second outlet 61 above the coolant level in the battery pack 6. During the circulation of the liquid cooling system, the refrigeration unit 2 pumps the coolant from the first outlet 21 into the second inlet 62 of the top battery pack 6. When the coolant level A rises to the level of the second outlet 61, the coolant flows from the second outlet 61 to the next battery pack 6. The coolant flows sequentially from top to bottom into the bottommost battery pack 6 and returns from the second outlet 61 of the bottommost battery pack 6 to the first return outlet 22 of the refrigeration unit 2, completing a single circulation of the coolant.

[0045] Example 2

[0046] like Figures 5 to 8 As shown, in this embodiment, in order to make the pipeline layout of the submerged liquid-cooled energy storage battery system more convenient and aesthetically pleasing, the position of the second liquid inlet 62 of the battery pack 6 is adjusted from one side (left side) of the battery pack 6 to the other side (right side) of the battery pack 6 by means of the inlet and outlet adjustment component 7. The second liquid inlet 62 is led to the same side of the second liquid outlet 61 of the battery pack 6 by means of pipelines laid in the battery pack 6.

[0047] Specifically, the immersion liquid-cooled battery energy storage system also includes an inlet and outlet adjustment component 7, which is arranged in a plane corresponding to the second liquid outlet 61 and the second liquid inlet 62 of the battery pack 6.

[0048] Further preferably, the inlet / outlet adjustment assembly 7 includes an assembly support 71, a first adjustment pipe 72, and a second adjustment pipe 73. The assembly support 71 is provided with an outlet liquid port 711 and an inlet liquid port 712. The two ends of the first adjustment pipe 72 are respectively connected to the second inlet liquid port 62 and the inlet liquid port 712, and the two ends of the second adjustment pipe 73 are respectively connected to the second outlet liquid port 61 and the outlet liquid port 711. Through the adjustment connection of the first adjustment pipe 72 and the second adjustment pipe 73 of the inlet / outlet adjustment assembly 7, the outlet positions of the original second outlet liquid port 61 and the second inlet liquid port 62 on the battery pack 6 are adjusted, facilitating the layout and connection of the battery pack inter-connection pipe 5. In this embodiment, after adjustment by the inlet / outlet adjustment assembly 7, the outlet liquid port 711 and the inlet liquid port 712 replace the second outlet liquid port 61 and the second inlet liquid port 62 in Embodiment 1 in connection with the inlet pipe 3, the return liquid pipe 4, and the battery pack inter-connection pipe 5.

[0049] In this embodiment, the battery pack 6 is provided with a first regulating pipe 72 (inlet conduit) connected to the second liquid inlet 62 and a second regulating pipe 73 connected to the second liquid outlet 61. The first regulating pipe 72 and the second regulating pipe 73 are located on the inner side of the front panel of the battery pack 6 housing. The outlet 711 of the liquid inlet conduit is located in the flow channel between the two battery modules on the left side of the battery pack 6. Multiple battery modules extend longitudinally and are arranged side by side laterally, forming multiple flow channels between adjacent battery modules. Coolant flows into the flow channel between the two battery modules on the left side of the battery pack 6 through the second liquid inlet 62 and the liquid inlet conduit. The multiple flow channels are connected through the channel at the rear of the battery pack 6, so that the coolant flows through the left and right flow channels and over the sidewall of each battery module. Therefore, in this embodiment, by adjusting the inlet and outlet regulating components 7, the pipeline layout of the battery pack connecting pipes 5 outside the battery energy storage system can be made more convenient and aesthetically pleasing without affecting the cooling effect of the coolant flow channels at the left and right inlets and outlets inside the battery pack.

[0050] Compared with the prior art, the present invention has the following advantages:

[0051] This invention connects a refrigeration unit 2 in series with several battery packs 6 connected in series, and places some coolant inside the battery packs 6. The refrigeration unit 2 is set up to regulate the temperature and flow rate of the coolant, thereby achieving all-round cooling of the battery packs 6, ensuring heat dissipation effect, improving heat dissipation efficiency and the safety and reliability of the energy storage system.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An immersion liquid-cooled battery energy storage system, characterized in that: The device includes a shelf, a refrigeration unit, an inlet pipe, a return pipe, a battery pack connecting pipe, and several battery packs. The battery packs are arranged vertically on the shelf. One end of the inlet pipe is connected to the first outlet of the refrigeration unit, and the other end is connected to the second inlet of the top battery pack. The inlets and outlets of the battery packs are connected in series through the battery pack connecting pipe, and the second outlet of the bottom battery pack is connected to the first return port of the refrigeration unit through the return pipe.

2. The immersion liquid-cooled battery energy storage system according to claim 1, characterized in that: The inlet and outlet are located between the second outlet of the upper battery pack and the second inlet of the lower battery pack.

3. The immersion liquid-cooled battery energy storage system according to claim 1, characterized in that: The refrigeration unit, the liquid inlet pipe, the liquid return pipe, and the battery pack are respectively installed in the shelf.

4. The immersion liquid-cooled battery energy storage system according to claim 1, characterized in that: Within the same battery pack, the horizontal height of the second liquid inlet is lower than the horizontal height of the second liquid outlet.

5. The immersion liquid-cooled battery energy storage system according to claim 1, characterized in that: The refrigeration unit is located below the battery pack at the bottom.

6. The immersion liquid-cooled battery energy storage system according to claim 1, characterized in that: During normal operation, the coolant level is level with the horizontal plane where the second outlet is located.

7. The immersion liquid-cooled battery energy storage system according to claim 1, characterized in that: It also includes an inlet / outlet adjustment component, which is configured to correspond to the plane of the second liquid outlet and the second liquid inlet of the battery pack.

8. The immersion liquid-cooled battery energy storage system according to claim 7, characterized in that: The inlet and outlet regulating assembly includes a component support, a first regulating pipe, and a second regulating pipe; the component support is provided with an outlet liquid port and an inlet liquid port; the two ends of the first regulating pipe are respectively connected to the second inlet liquid port and the inlet liquid port, and the two ends of the second regulating pipe are respectively connected to the second outlet liquid port and the outlet liquid port.

Images