Battery system and battery cabinet

Abstract

The utility model provides a battery system and a battery cabinet. The battery system comprises a cooling device; the upper port of the liquid supply header pipe is communicated with the liquid supply port of the cooling device, and a plurality of communication ports are formed in the extension direction of the liquid supply header pipe at intervals; the plurality of communication ports are communicated with the liquid inlets of the plurality of battery packs in a one-to-one correspondence manner; the liquid outlets of the plurality of battery packs are communicated with the liquid inlet end of the liquid return pipeline, and the liquid outlet end of the liquid return pipeline is communicated with the liquid return opening of the cooling device; a liquid storage component is arranged on the liquid return pipeline, and a liquid inlet and a liquid outlet of the liquid storage component are both communicated with a pipe cavity of the liquid return pipeline; the top of the liquid storage cavity is provided with a top opening communicated with the atmospheric environment. Wherein the lower port of the liquid supply header pipe and the atmospheric environment can be arranged in an on-off mode. Or, the ventilation position of the liquid supply header pipe can be connected and disconnected with the atmospheric environment, and the lower port of the liquid supply header pipe is sealed or can be connected and disconnected with the atmospheric environment; the ventilation position is located above the plurality of communication ports.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and more specifically, to a battery system and battery cabinet. Background Technology

[0002] In the field of energy storage technology, submerged battery packs have attracted attention due to their unique cooling and protection mechanisms. These packs effectively control battery temperature by immersing the battery cells in an insulating liquid, utilizing the liquid's thermal conductivity to ensure the pack's performance and safety.

[0003] Among them, overflow submerged battery packs have attracted attention due to their low pressure loss. In overflow submerged battery packs, backflow in the closed inlet line is mainly caused by the siphon effect.

[0004] Currently, the common solution for backflow in closed-loop inlet lines is to add an anti-backflow module, such as a check valve. However, in actual use, the spring in the check valve may creep due to prolonged use, resulting in weakened elasticity. Ultimately, this may cause backflow due to increased negative pressure. Utility Model Content

[0005] The main purpose of this utility model is to provide a battery system and battery cabinet to prevent backflow in the closed liquid inlet pipe of the overflow immersion battery pack.

[0006] To achieve the above objectives, according to one aspect of the present invention, a battery system is provided, comprising: a cooling device for providing coolant and having a supply port and a return port; a main supply pipe, the upper end of which is connected to the supply port of the cooling device, and a plurality of connecting ports spaced apart along its extension direction, each connecting port being connected to the lumen of the main supply pipe; a plurality of battery packs, each connecting port being correspondingly and connected to the inlet of the plurality of battery packs; a return pipe, the drain ports of the plurality of battery packs being connected to the inlet of the return pipe, and the outlet of the return pipe being connected to the return port of the cooling device; a liquid storage component provided on the return pipe, the liquid storage component having a liquid storage chamber, an inlet, and a drain outlet, the inlet and the drain outlet being connected to the liquid storage chamber and the lumen of the return pipe; and the top of the liquid storage chamber having a top opening connected to the atmospheric environment. The lower port of the liquid supply main pipe can be connected to or disconnected from the atmospheric environment; or, the lower port of the liquid supply main pipe is closed, and the venting position of the liquid supply main pipe can be connected to or disconnected from the atmospheric environment; or, the lower port of the liquid supply main pipe can be connected to or disconnected from the atmospheric environment, and the venting position of the liquid supply main pipe can be connected to or disconnected from the atmospheric environment; the venting position is located above multiple connecting ports.

[0007] Furthermore, the battery system also includes a first vent pipe, the first port of which is connected to the lower port of the liquid supply main pipe, and the second port of which is connected to the atmospheric environment; a first control valve is provided on the first vent pipe to control the on / off state of the first vent pipe.

[0008] Furthermore, the battery system also includes a second vent pipe, the first end of which is connected to and communicates with the vent position of the liquid supply main pipe, and the second port of which is connected to the atmospheric environment; a second control valve is provided on the second vent pipe to control the on / off state of the second vent pipe.

[0009] Optionally, the return pipeline includes a first section and a second section; the drain ports of multiple battery packs are all connected to the first port of the first section, the second port of the first section is connected to the inlet of the liquid storage component, the drain outlet of the liquid storage component is connected to the first port of the second section, and the second port of the second section is connected to the return port of the cooling device; a pump body and a connection position located downstream of the pump body are provided on the second section, and the connection position of the second section is configured to be openable and closedable from the atmospheric environment, so that the ventilation position of the main liquid supply pipe can be openable and closedable from the atmospheric environment.

[0010] Optionally, the battery pack located at the bottom among the multiple battery packs is the bottom battery pack; the return liquid pipeline includes a first pipe section and a second pipe section; the drain ports of the remaining battery packs (excluding the bottom battery pack) are all connected to the first port of the first pipe section; the return liquid pipeline also includes a return liquid branch pipe, the first port of which is connected to the drain port of the bottom battery pack; the second port of the first pipe section and the second port of the return liquid branch pipe are both connected to the inlet of the liquid storage component; the drain outlet of the liquid storage component is connected to the first port of the second pipe section, and the second port of the second pipe section is connected to the return liquid port of the cooling device; a pump body and a connection position located downstream of the pump body are provided on the second pipe section, and the connection position of the second pipe section is configured to be openable and closedable from the atmospheric environment, so that the ventilation position of the main liquid supply pipe is openable and closedable from the atmospheric environment.

[0011] Furthermore, the battery system also includes a third vent pipe, the first end of which is connected to the connection point of the second pipe section, and the second port of which is connected to the atmospheric environment; a third control valve is provided on the third vent pipe to control the on / off state of the third vent pipe.

[0012] Furthermore, multiple battery packs are distributed vertically; liquid storage components are located below the multiple battery packs; and cooling devices are located above the multiple battery packs.

[0013] Furthermore, each connection port and the corresponding liquid inlet of the battery pack are connected by a liquid inlet branch pipe; each liquid inlet branch pipe is equipped with a one-way mechanism so that the liquid flowing out of each connection port flows to the liquid inlet of the corresponding battery pack.

[0014] Furthermore, the one-way mechanism includes a one-way valve. And / or, the inlet branch pipe includes a first branch section, a second branch section, and a third branch section connected in sequence, the end of the first branch section away from the second branch section being connected to a corresponding connection port, and the end of the third branch section away from the second branch section being connected to the corresponding battery pack inlet port; the height of the end of the first branch section connected to the second branch section is higher than the height of the end of the third branch section connected to the second branch section, to form a raised structure; the one-way mechanism includes the raised structure.

[0015] Furthermore, when the lower port of the liquid supply main is connected to and disconnected from the atmospheric environment, the battery system also includes a liquid pump, the lower port of the liquid supply main is connected to the inlet of the liquid pump, and the outlet of the liquid pump is connected to the top opening of the liquid storage chamber.

[0016] According to another aspect of the present invention, a battery cabinet is provided, which includes the battery system described above.

[0017] According to the technical solution of this utility model, the battery system includes a cooling device, a main supply pipe, multiple battery packs, and a return pipe. The cooling device provides coolant and has a supply port and a return port. The upper end of the main supply pipe is connected to the supply port of the cooling device, and multiple connecting ports are spaced apart along its extension direction, each connecting port communicating with the lumen of the main supply pipe. Each connecting port corresponds to and communicates with the inlet of one of the multiple battery packs. The drain ports of each battery pack are connected to the inlet of the return pipe, and the outlet of the return pipe is connected to the return port of the cooling device. A storage component is provided on the return pipe, having a storage chamber, an inlet, and a drain outlet. Both the inlet and drain outlet communicate with the storage chamber and the lumen of the return pipe. The top of the storage chamber has a top opening communicating with the atmospheric environment. In this design, the lower port of the liquid supply main pipe can be switched on and off with the atmospheric environment; alternatively, the lower port of the liquid supply main pipe can be closed, and the venting point of the liquid supply main pipe can be switched on and off with the atmospheric environment; or alternatively, the lower port of the liquid supply main pipe can be switched on and off with the atmospheric environment, and the venting point of the liquid supply main pipe can be switched on and off with the atmospheric environment; the venting point is located above multiple connecting ports. The battery system of this application can prevent backflow in the closed liquid inlet pipe of the overflow immersion battery pack. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1A schematic diagram of the battery system according to the first solution of the present invention is shown; wherein the one-way mechanism is a one-way valve;

[0020] Figure 2 A schematic diagram of a battery system according to the first solution of the present invention is shown; wherein the unidirectional mechanism is a raised structure;

[0021] Figure 3 A schematic diagram of a second configuration of the return pipeline according to this utility model is shown;

[0022] Figure 4 A partial structural schematic diagram of a battery system according to Embodiment 2 of the present invention is shown;

[0023] Figure 5 A partial structural schematic diagram of a battery system according to Embodiment 3 of the present invention is shown;

[0024] Figure 6 A schematic diagram of the structural arrangement of the cooling device, multiple battery packs, and liquid storage component of the battery system according to the present invention is shown from one perspective.

[0025] Figure 7 This diagram shows a structural arrangement of the cooling device, multiple battery packs, and liquid storage component of the battery system according to the present invention from another perspective.

[0026] The above figures include the following reference numerals:

[0027] 10. Cooling device; 11. Liquid supply port; 12. Liquid return port;

[0028] 20. Main liquid supply pipe; 21. Connecting port; 211. Bottom connecting port; 212. Secondary bottom connecting port; 22. First control valve; 221. First vent pipe; 23. Second control valve; 231. Second vent pipe;

[0029] 30. Battery pack; 301. Bottom battery pack; 302. Secondary bottom battery pack; 31. Liquid inlet; 32. Liquid outlet;

[0030] 40. Inlet branch pipe; 401. First branch pipe section; 4011. Higher end; 402. Second branch pipe section; 403. Third branch pipe section; 4031. Lower end; 411. Check valve;

[0031] 50. Return liquid pipeline; 511. First pipeline section; 512. Second pipeline section; 5121. Third vent pipe; 5122. Third control valve; 5123. Pump body; 52. Return liquid branch pipe; 53. Return liquid main pipe; 531. Connection port; 54. Return liquid sub-pipe;

[0032] 60. Liquid storage component; 61. Liquid inlet; 62. Liquid outlet; 63. Cover; 631. Vent hole;

[0033] 70. Controller; 80. First connecting pipe; 81. Liquid pump; 90. Second connecting pipe. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] This utility model provides a battery system; please refer to [reference needed]. Figures 1 to 7 The battery system includes a cooling device 10, a main liquid supply pipe 20, multiple battery packs 30, and a return liquid pipe 50.

[0038] The cooling device 10 is used to supply coolant, and the cooling device 10 has a supply port 11 and a return port 12.

[0039] The upper end of the main supply pipe 20 is its inlet end; the upper port of the main supply pipe 20 is connected to the supply port 11 of the cooling device 10, so that the coolant flowing out of the cooling device 10 flows into the main supply pipe 20 through the upper port of the main supply pipe 20. Multiple connecting ports 21 are provided at intervals along the extension direction of the main supply pipe 20, and each of the multiple connecting ports 21 is connected to the cavity of the main supply pipe 20; the multiple connecting ports 21 are correspondingly provided and connected to the inlets 31 of multiple battery packs 30, so that the coolant flowing into the main supply pipe 20 flows into the corresponding battery pack 30 through each connecting port 21 from the inlet 31 of the corresponding battery pack 30; the coolant flowing into the battery pack 30 is used to cool and reduce the temperature of the batteries within the battery pack 30.

[0040] The battery pack 30 includes a battery housing and multiple batteries disposed within the battery housing. The liquid inlet 31 of the battery pack 30 is located at the lower part of the battery housing, and the liquid outlet 32 ​​of the battery pack 30 is located at the upper part of the battery housing. The battery pack 30 is an overflow immersion battery pack.

[0041] The drain ports 32 of multiple battery packs 30 are all connected to the inlet end of the return pipe 50, and the outlet end of the return pipe 50 is connected to the return port 12 of the cooling device 10, so that the liquid overflowing from the drain ports 32 of the battery packs 30 flows into the return pipe 50 and then flows back into the cooling device 10 through the return port 12 of the cooling device 10; thus forming a coolant circulation loop.

[0042] A liquid storage component 60 is provided on the return liquid pipeline 50. The liquid storage component 60 has a liquid storage chamber, a liquid inlet 61, and a liquid outlet 62. Both the liquid inlet 61 and the liquid outlet 62 are connected to the liquid storage chamber, and both the liquid inlet 61 and the liquid outlet 62 are connected to the lumen of the return liquid pipeline 50. The top of the liquid storage chamber has a top opening that communicates with the atmospheric environment.

[0043] Specifically, the return pipeline 50 includes a first section 511 and a second section 512.

[0044] The first configuration of the return line 50 is as follows: Figure 1 and Figure 2 As shown, the drain ports 32 of multiple battery packs 30 are all connected to the first port of the first pipe section 511. The second port of the first pipe section 511 is connected to the inlet port 61 of the liquid storage component 60. The drain outlet 62 of the liquid storage component 60 is connected to the first port of the second pipe section 512. The second port of the second pipe section 512 is connected to the return port 12 of the cooling device 10. That is, the second end of the second pipe section 512 is the outlet end of the return pipe 50. The liquid overflowing from the drain ports 32 of the battery packs 30 flows into the first pipe section 511, and then enters the liquid storage chamber through the inlet port 61 of the liquid storage component 60. The liquid in the liquid storage chamber flows into the second pipe section 512 through the drain outlet 62, and then flows back into the cooling device 10 through the return port 12 of the cooling device 10.

[0045] The second configuration of the return line 50 is as follows: Figure 3As shown, the drain ports 32 of all battery packs 30 except the bottom battery pack 301 are connected to the first port of the first pipe section 511; the return pipe 50 also includes a return branch pipe 54, the first port of which is connected to the drain port 32 of the bottom battery pack 301; the second port of the first pipe section 511 and the second port of the return branch pipe 54 are both connected to the inlet port 61 of the liquid storage component 60; the drain outlet 62 of the liquid storage component 60 is connected to the first port of the second pipe section 512, and the second port of the second pipe section 512 is connected to the return port 12 of the cooling device 10; that is, the second end of the second pipe section 512 is the outlet end of the return pipe 50.

[0046] For the second configuration of the return liquid pipeline 50, a separate return liquid branch pipe is provided for the bottom battery pack 301. For the other battery packs 30 besides the bottom battery pack 301, the liquid overflowing from the drain port 32 of the battery pack 30 flows into the first pipe section 511, and then enters the storage chamber through the inlet 61 of the storage component 60; for the bottom battery pack 301, the liquid overflowing from the drain port 32 of the bottom battery pack 301 flows into the return liquid branch pipe 54, and then enters the storage chamber through the inlet 61 of the storage component 60; the liquid in the storage chamber flows into the second pipe section 512 through the drain outlet 62, and then flows back into the cooling device 10 through the return liquid port 12 of the cooling device 10.

[0047] Among the multiple connecting ports 21, the lowest connecting port 21 is the bottom connecting port 211, and the upper connecting port 21 adjacent to the bottom connecting port 211 is the secondary bottom connecting port 212; among the multiple battery packs 30, the lowest battery pack 30 is the bottom battery pack 301, and the upper battery pack 30 adjacent to the bottom battery pack 301 is the secondary bottom battery pack 302; the bottom connecting port 211 is connected to the liquid inlet 31 of the bottom battery pack 301, and the secondary bottom connecting port 212 is connected to the liquid inlet 31 of the secondary bottom battery pack 302; among the multiple battery packs 30, the uppermost battery pack 30 is the top battery pack.

[0048] In practice, the energy storage system includes a battery system. To avoid the energy storage system occupying too much space, the battery cabinet is usually designed to be narrow, which makes the battery cabinet taller. The liquid storage component 60 set inside the battery cabinet will further increase the height of the battery cabinet. In order to reduce the space occupied by the liquid storage component 60, the liquid storage component 60 is usually designed to be smaller, which results in a smaller volume of the liquid storage chamber.

[0049] In the battery pack 30, liquid flows into the storage chamber by overflow; that is, when the liquid level in the battery pack 30 reaches the drain port 32, the liquid in the battery pack 30 flows out through the drain port 32. In the storage component 60, liquid also flows out by overflow; that is, when the liquid level in the storage chamber reaches the drain outlet 62, the liquid in the storage chamber flows out through the drain outlet 62 and then flows into the second pipe section 512.

[0050] The entire battery system has a preset coolant circulation volume to maintain coolant circulation. However, due to the small volume of the reservoir, the drain outlet 62 is relatively close to the top opening of the reservoir. Therefore, if the flow rate of liquid into the reservoir is too large, the liquid can easily overflow through the top opening into the external environment, which is the internal environment of the battery cabinet. This overflowing liquid can then flow into other components within the battery cabinet, potentially damaging them. Furthermore, the overflow disrupts the coolant circulation volume, reducing the overall coolant circulation and preventing further coolant recirculation.

[0051] During normal battery system operation, the lower port of the main supply pipe 20 is closed or sealed. If the cooling device 10 stops supplying liquid to the main supply pipe 20 and the multiple battery packs 30, since only the top opening of the storage chamber is connected to the atmosphere, and the liquid in the main supply pipe 20 flows downwards under gravity, a negative pressure forms in the pipe. Therefore, the pressure on the drain port 32 side of the battery pack 30 is greater than the pressure on its inlet port 31 side, causing the liquid in the battery pack 30 to flow backwards into the main supply pipe 20. The liquid in the main supply pipe 20, under gravity, will... Flowing downwards; taking the liquid in the main supply pipe 20 flowing downwards under the action of gravity to the area between the bottom connection port 211 and the secondary bottom connection port 212 as an example, the liquid in the main supply pipe 20 will flow into the bottom battery pack 301 through the bottom connection port 211. That is, excessive liquid flows into the bottom battery pack 301 through the bottom connection port 211, and then the bottom battery pack 301 will overflow with excessive liquid, which will cause the liquid flow into the storage chamber to be too large, thus causing the liquid in the storage chamber to overflow out through its top opening.

[0052] It should be noted that if the cooling device 10 stops supplying liquid to the main liquid supply pipe 20 and the multiple battery packs 30, at least some of the battery packs 30 except the bottom battery pack 301 will experience backflow starting from the top battery pack and moving downwards; that is, backflow will inevitably occur in the top battery pack, and excessive liquid will inevitably overflow from the bottom battery pack 301.

[0053] This application provides three solutions to the above problems.

[0054] The first solution is to allow the lower port of the liquid supply manifold 20 to be openly and closedly connected to the atmosphere. During normal battery system circulation, the lower port of the liquid supply manifold 20 is disconnected from the atmosphere, effectively closing it. Simultaneously, when the cooling device 10 stops supplying liquid to the liquid supply manifold 20 and the multiple battery packs 30, the lower port of the liquid supply manifold 20 is switched from being closed to being open, allowing outside air to enter the liquid supply manifold 20. This ensures that the pressure at the drain port 32 of the battery pack 30 does not exceed the pressure at its inlet port 31, preventing backflow in the battery pack 30.

[0055] The second solution involves setting the venting position of the main liquid supply pipe 20 to be open and closed to the atmosphere, with the lower end of the main liquid supply pipe 20 closed. The venting position is located above the multiple connecting ports 21, specifically above the top connecting port, with the uppermost connecting port 21 being the top connecting port. During normal battery system circulation, the venting position of the main liquid supply pipe 20 is disconnected from the atmosphere, effectively closing the venting position. When the cooling device 10 stops supplying liquid to the main liquid supply pipe 20 and the multiple battery packs 30, the venting position of the main liquid supply pipe 20 is switched from disconnected to open, allowing outside air to enter the main liquid supply pipe 20. This ensures that the pressure at the drain port 32 of the battery pack 30 does not exceed the pressure at its inlet port 31, preventing backflow in the battery pack 30.

[0056] The third solution involves setting the lower port of the liquid supply main 20 to be openable or closedable from the atmosphere, and setting the venting position of the liquid supply main 20 to be openable or closedable from the atmosphere. During normal battery system circulation, the lower port of the liquid supply main 20 is disconnected from the atmosphere, effectively closing the lower port; simultaneously, the venting position of the liquid supply main 20 is also disconnected from the atmosphere, effectively closing the venting position. When the cooling device 10 stops supplying liquid to the liquid supply main 20 and the multiple battery packs 30, the lower port of the liquid supply main 20 is switched from being closed to being open to the atmosphere, and / or the venting position of the liquid supply main 20 is switched from being closed to being open to the atmosphere. This ensures that the pressure at the drain port 32 of the battery pack 30 will not exceed the pressure at its inlet port 31, preventing backflow in the battery pack 30.

[0057] In this application, specifically, a plurality of battery packs 30 are distributed in a vertical direction; a liquid storage component 60 is located below the plurality of battery packs 30; and a cooling device 10 is located above the plurality of battery packs 30.

[0058] Optionally, in this application, the main liquid supply pipe 20 includes a vertical pipe section extending in a vertical direction, and all the connecting ports 21 on the main liquid supply pipe 20 are located on the vertical pipe section of the main liquid supply pipe 20.

[0059] Optionally, in this application, the top of the liquid storage chamber is open to form a top opening, and the top opening of the liquid storage chamber is in communication with the atmospheric environment.

[0060] Optionally, in this application, the liquid storage component 60 is a box structure, that is, the liquid storage component 60 is a liquid storage tank.

[0061] In this application, the return pipeline 50 includes a return main pipe 53 and multiple return branch pipes 52.

[0062] When the return liquid pipeline 50 is configured in the first way, the return liquid main pipe 53 is provided with multiple connection ports 531 at intervals along its axial direction. The multiple connection ports 531 and multiple battery packs 30 are arranged one-to-one so that the drain port 32 of each battery pack 30 is connected to the corresponding connection port 531, thereby allowing the drain port 32 of each battery pack 30 to communicate with the lumen of the return liquid main pipe 53 through the corresponding connection port 531. The lower port of the return liquid main pipe 53 is connected to the first port of the first pipe section 511. The upper port of the return liquid main pipe 53 forms a connection port 531 or is closed.

[0063] Specifically, the drain port 32 of each battery pack 30 and the corresponding connection port 531 are connected by a return branch pipe 52; that is, the inlet end of each return branch pipe 52 is connected to the drain port 32 of the corresponding battery pack 30, and the inlet ends of multiple return branch pipes 52 together form the inlet end of the return pipeline 50.

[0064] Optionally, the return manifold 53 extends vertically.

[0065] When the return pipeline 50 is configured in the second way, the return main pipe 53 is provided with multiple connection ports 531 at intervals along its axial direction. The other battery packs 30 in the multiple battery packs 30, except for the bottom battery pack 301, are arranged one-to-one with the multiple connection ports 531, so that the drain port 32 of each battery pack 30 in the multiple battery packs 30, except for the bottom battery pack 301, is connected to the corresponding connection port 531. Thus, the drain port 32 of each battery pack 30 in the multiple battery packs 30, except for the bottom battery pack 301, is connected to the lumen of the return main pipe 53 through the corresponding connection port 531. The lower port of the return main pipe 53 is connected to the first port of the first pipe section 511. The upper port of the return main pipe 53 forms a connection port 531 or is closed.

[0066] Specifically, the drain port 32 and the corresponding connection port 531 of each battery pack 30 other than the bottom battery pack 301 are connected by a return branch pipe 52; that is, the inlet end of each return branch pipe 52 is connected to the drain port 32 of the corresponding battery pack 30, and the inlet ends of the multiple return branch pipes 52 and the first end of the return branch pipe 54 together form the inlet end of the return pipeline 50.

[0067] Optionally, the return manifold 53 extends vertically.

[0068] In this application, a pump body 5123 is provided on the second pipe section 512 to pump the liquid in the second pipe section 512 into the return port 12 of the cooling device 10.

[0069] Specifically, the pump body 5123 is positioned closer to the discharge outlet 62 than the return port 12.

[0070] In this application, each connection port 21 and the corresponding liquid inlet 31 of the battery pack 30 are connected by a liquid inlet branch pipe 40; each liquid inlet branch pipe 40 is provided with a one-way mechanism to allow liquid flowing from each connection port 21 to flow to the corresponding liquid inlet 31 of the battery pack 30; that is, for each liquid inlet branch pipe 40, by providing a one-way mechanism, liquid can only flow from the connection port 21 to the battery pack 30, and cannot flow from the battery pack 30 to the connection port 21. In this way, backflow in the battery pack 30 can be further prevented.

[0071] Specifically, the first configuration of the one-way mechanism is: the one-way mechanism is a one-way valve 411.

[0072] Specifically, the second configuration of the one-way mechanism is as follows: the liquid inlet branch pipe 40 includes a first branch pipe section 401, a second branch pipe section 402, and a third branch pipe section 403 connected in sequence; the end of the first branch pipe section 401 away from the second branch pipe section 402 is connected to the corresponding connecting port 21, and the end of the third branch pipe section 403 away from the second branch pipe section 402 is connected to the liquid inlet 31 of the corresponding battery pack 30; the height of the end of the first branch pipe section 401 connected to the second branch pipe section 402 is higher than the height of the end of the third branch pipe section 403 connected to the second branch pipe section 402, so as to form a raised structure; the one-way mechanism is a raised structure; in this way, the liquid can be prevented from flowing from the battery pack 30 to the connecting port 21 by the height difference.

[0073] Optionally, the first branch pipe section 401 extends horizontally, the third branch pipe section 403 extends horizontally, and the second branch pipe section 402 extends vertically.

[0074] like Figure 2 As shown, the higher end 4011 is the end of the first branch pipe section 401 that connects to the second branch pipe section 402; the lower end 4031 is the end of the third branch pipe section 403 that connects to the second branch pipe section 402.

[0075] Specifically, the third configuration of the one-way mechanism is as follows: the one-way mechanism includes a one-way valve 411 and a lifting structure; the one-way valve 411 is installed on the third branch pipe section 403.

[0076] In this application, specifically, a liquid supply pump is provided on the liquid supply main pipe 20 to supply the coolant in the cooling device 10 to the multiple battery packs 30; the liquid supply pump is located upstream of the multiple communication ports 21.

[0077] Specifically, the aforementioned "stopping of the cooling device 10 supplying liquid to the main liquid supply pipe 20 and multiple battery packs 30" means that the liquid supply pump stops working.

[0078] In this application, specifically, a cover 63 is provided at the top opening of the liquid storage chamber; the above-mentioned "liquid in the liquid storage chamber overflows through its top opening" means that the liquid in the liquid storage chamber overflows from the gap between its top opening, the cover 63 and the liquid storage component 60; the cover 63 is provided with a vent 631 so that the top opening of the liquid storage chamber can communicate with the atmospheric environment through the vent 631.

[0079] This utility model also provides a battery cabinet, which includes the above-described battery system.

[0080] Specifically, the battery cabinet includes an energy storage system, which includes the aforementioned battery system.

[0081] Specifically, when the battery cabinet stops, the liquid supply pump stops working, and the cooling device 10 stops supplying liquid to the main liquid supply pipe 20 and multiple battery packs 30.

[0082] Example 1

[0083] This embodiment adopts either the first solution or the third solution.

[0084] Specifically, such as Figure 1 and Figure 2 As shown, the battery system also includes a first vent pipe 221. The first port of the first vent pipe 221 is connected to and communicates with the lower port of the liquid supply main pipe 20, and the second port of the first vent pipe 221 is connected to the atmospheric environment. A first control valve 22 is provided on the first vent pipe 221 to control the on / off state of the first vent pipe 221, thereby controlling the connection and disconnection of the lower port of the liquid supply main pipe 20 with the atmospheric environment.

[0085] Specifically, when the first control valve 22 is in the open state, the first vent pipe 221 is in the connected state, and the lower port of the liquid supply main pipe 20 is in the connected state with the atmospheric environment; when the first control valve 22 is in the closed state, the first vent pipe 221 is in the disconnected state, and the lower port of the liquid supply main pipe 20 is in the disconnected state with the atmospheric environment.

[0086] Optionally, the first control valve 22 is a solenoid valve.

[0087] Specifically, the battery system includes a controller 70, which is communicatively connected to a first control valve 22 to control the opening and closing of the first control valve 22.

[0088] Specifically, when the controller 70 receives a shutdown command for the battery cabinet, it controls the first control valve 22 to switch to the open state.

[0089] In this embodiment, the battery system also includes a liquid pump 81. The lower port of the liquid supply main pipe 20 is connected to the liquid inlet of the liquid pump 81, and the liquid outlet of the liquid pump 81 is connected to the top opening of the liquid storage chamber. When the cooling device 10 stops supplying liquid to the liquid supply main pipe 20 and the multiple battery packs 30, the liquid in the liquid supply main pipe 20 is pumped into the liquid storage chamber by the liquid pump 81 to avoid the liquid from stagnating in the liquid supply main pipe 20.

[0090] It should be noted that since the top opening of the liquid storage chamber is connected to the atmospheric environment, the outlet of the liquid pump 81 can also be connected to the atmospheric environment. Therefore, the installation of the liquid pump 81 will not affect the connection between the lower port of the liquid supply main pipe 20 and the atmospheric environment.

[0091] Specifically, when the cooling device 10 stops supplying liquid to the main liquid supply pipe 20 and the multiple battery packs 30, the first control valve 22 opens, and the liquid pump 81 starts simultaneously. That is, when the controller 70 receives a shutdown command from the battery cabinet, it controls the first control valve 22 to switch to the open state and simultaneously controls the liquid pump 81 to start.

[0092] Specifically, the outlet of the pump 81 is connected to the top opening of the storage chamber via a first connecting pipe 80.

[0093] Specifically, the liquid pump 81 is mounted on the first vent pipe 221, and the liquid pump 81 is located on the side of the first control valve 22 near the second end of the first vent pipe 221; or, the liquid inlet of the liquid pump 81 is connected to the second port of the first vent pipe 221.

[0094] Example 2

[0095] This embodiment adopts either the second or the third solution.

[0096] Optionally, the liquid supply main pipe 20 includes a horizontal pipe section extending in a horizontal direction, and the venting position is located on the horizontal pipe section of the liquid supply main pipe 20.

[0097] Specifically, such as Figure 4 As shown, the battery system also includes a second vent pipe 231. The first end of the second vent pipe 231 is connected to and communicates with the venting position of the liquid supply main pipe 20, and the second port of the second vent pipe 231 is connected to the atmospheric environment. A second control valve 23 is provided on the second vent pipe 231 to control the on / off state of the second vent pipe 231, thereby controlling the connection and disconnection between the venting position of the liquid supply main pipe 20 and the atmospheric environment.

[0098] Specifically, when the second control valve 23 is in the open state, the second vent pipe 231 is in the connected state, and the vent position of the liquid supply main pipe 20 is in the connected state with the atmospheric environment; when the second control valve 23 is in the closed state, the second vent pipe 231 is in the disconnected state, and the vent position of the liquid supply main pipe 20 is disconnected from the atmospheric environment.

[0099] Optionally, the second control valve 23 is an electric valve; for example, the second control valve 23 is an electric ball valve.

[0100] Specifically, the battery system includes a controller 70, which is communicatively connected to a second control valve 23 to control the opening and closing of the second control valve 23.

[0101] Specifically, when the controller 70 receives a shutdown command for the battery cabinet, it controls the second control valve 23 to switch to the open state.

[0102] Specifically, the second port of the second vent pipe 231 extends to the outside of the battery cabinet to communicate with the atmospheric environment.

[0103] Optionally, the second vent pipe 231 and the second control valve 23 are both located outside the battery cabinet.

[0104] Example 3

[0105] This embodiment adopts either the second or the third solution.

[0106] In this embodiment, a connecting position is provided on the second pipe section 512, located downstream of the pump body 5123. The connecting position of the second pipe section 512 is configured to be openable or closedable from the atmospheric environment. Since the return port 12 and the supply port 11 of the cooling device 10 are connected, the connecting position of the second pipe section 512 is connected to the venting position of the main supply pipe 20, and thus the pressure at the connecting position of the second pipe section 512 and the venting position of the main supply pipe 20 are equal. By making the connecting position of the second pipe section 512 openable or closedable from the atmospheric environment, the venting position of the main supply pipe 20 is also openable or closedable from the atmospheric environment.

[0107] Specifically, during normal battery system operation, the connection point of the second pipe section 512 is disconnected from the atmosphere, i.e., the connection point of the second pipe section 512 is closed, thus disconnecting the venting point of the main liquid supply pipe 20 from the atmosphere. When the cooling device 10 stops supplying liquid to the main liquid supply pipe 20 and the multiple battery packs 30, the connection point of the second pipe section 512 is switched from disconnected to connected with the atmosphere, thus opening the connection point of the main liquid supply pipe 20. At this time, outside air enters the second pipe section 512 through the connection point, ensuring that the pressure at the drain port 32 of the battery pack 30 does not exceed the pressure at its inlet port 31, preventing backflow in the battery pack 30.

[0108] Specifically, the connection point is located near the return port 12 of the cooling device 10.

[0109] In this embodiment, as Figure 5 As shown, the battery system also includes a third vent pipe 5121. The first end of the third vent pipe 5121 is connected to the connection position of the second pipe section 512, and the second port of the third vent pipe 5121 is connected to the atmospheric environment. A third control valve 5122 is provided on the third vent pipe 5121 to control the on / off state of the third vent pipe 5121, thereby controlling the connection and disconnection between the connection position of the second pipe section 512 and the atmospheric environment.

[0110] Specifically, when the third control valve 5122 is in the open state, the third vent pipe 5121 is in the connected state, and the connected position of the second pipe section 512 is in the connected state with the atmospheric environment; when the third control valve 5122 is in the closed state, the third vent pipe 5121 is in the disconnected state, and the connected position of the second pipe section 512 is in the disconnected state with the atmospheric environment.

[0111] Optionally, the third control valve 5122 is an electric valve; for example, the third control valve 5122 is an electric ball valve.

[0112] Specifically, the battery system includes a controller 70, which is communicatively connected to a third control valve 5122 to control the opening and closing of the third control valve 5122.

[0113] Specifically, when the controller 70 receives a shutdown command for the battery cabinet, it controls the third control valve 5122 to switch to the open state.

[0114] Optionally, the third vent pipe 5121 is located inside the battery cabinet.

[0115] Specifically, the first configuration method in which the second port of the third vent pipe 5121 is connected to the atmospheric environment is as follows: the second port of the third vent pipe 5121 extends to the outside of the battery cabinet to connect with the atmospheric environment.

[0116] Specifically, in a second configuration where the second port of the third vent pipe 5121 is connected to the atmospheric environment, the second port of the third vent pipe 5121 is connected to the top opening of the liquid storage chamber. Since the top opening of the liquid storage chamber is connected to the atmospheric environment, the second port of the third vent pipe 5121 can also be connected to the atmospheric environment. Furthermore, if liquid enters the third vent pipe 5121 from the second pipe section 512, the liquid in the third vent pipe 5121 can be drained into the liquid storage chamber, preventing a reduction in coolant. The amount of liquid entering the third vent pipe 5121 from the second pipe section 512 is small and will not affect the coolant's circulation.

[0117] Specifically, the second port of the third vent pipe 5121 is connected to the top opening of the liquid storage chamber via the second connecting pipe 90.

[0118] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0119] The battery system provided by this utility model includes a cooling device 10, a main supply pipe 20, multiple battery packs 30, and a return pipe 50. The cooling device 10 provides coolant and has a supply port 11 and a return port 12. The upper end of the main supply pipe 20 is connected to the supply port 11 of the cooling device 10. Multiple connecting ports 21 are spaced apart along the extension direction of the main supply pipe 20, and each connecting port 21 is connected to the cavity of the main supply pipe 20. Each connecting port 21 corresponds to and is connected to the inlet port 31 of one of the multiple battery packs 30. The drain ports 32 of multiple battery packs 30 are all connected to the inlet end of the return liquid pipeline 50, and the outlet end of the return liquid pipeline 50 is connected to the return liquid port 12 of the cooling device 10. A liquid storage component 60 is provided on the return liquid pipeline 50, which has a liquid storage chamber, an inlet 61, and a drain outlet 62. Both the inlet 61 and the drain outlet 62 are connected to the liquid storage chamber and to the cavity of the return liquid pipeline 50. The top of the liquid storage chamber has a top opening that communicates with the atmospheric environment. The lower port of the main liquid supply pipe 20 can be switched on and off with the atmospheric environment; alternatively, the lower port of the main liquid supply pipe 20 can be closed, and the venting position of the main liquid supply pipe 20 can be switched on and off with the atmospheric environment; or the lower port of the main liquid supply pipe 20 can be switched on and off with the atmospheric environment, and the venting position of the main liquid supply pipe 20 can be switched on and off with the atmospheric environment; the venting position is located above the multiple connecting ports 21. The battery system of this application can prevent backflow in the closed liquid inlet line of the overflow immersion battery pack.

[0120] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0121] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0122] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery system characterized by, The battery system comprises: a cooling device (10) for providing cooling liquid and having a liquid supply port (11) and a liquid return port (12); a liquid supply main pipe (20), an upper port of the liquid supply main pipe (20) being in communication with the liquid supply port (11) of the cooling device (10), a plurality of communication ports (21) being arranged on the liquid supply main pipe (20) at intervals along the extension direction of the liquid supply main pipe (20), the plurality of communication ports (21) each being in communication with the lumen of the liquid supply main pipe (20); a plurality of battery packs (30), the plurality of communication ports (21) being arranged in one-to-one correspondence with the liquid inlet ports (31) of the plurality of battery packs (30) and being in communication with the liquid inlet ports (31) of the plurality of battery packs (30); a liquid return pipeline (50), the liquid outlet ports (32) of the plurality of battery packs (30) each being in communication with the liquid inlet end of the liquid return pipeline (50), the liquid outlet end of the liquid return pipeline (50) being in communication with the liquid return port (12) of the cooling device (10); the liquid return pipeline (50) being provided with a liquid storage component (60), the liquid storage component (60) having a liquid storage cavity, a liquid inlet port (61) and a liquid outlet port (62), the liquid inlet port (61) and the liquid outlet port (62) each being in communication with the liquid storage cavity and each being in communication with the lumen of the liquid return pipeline (50); the top of the liquid storage cavity having a top opening in communication with the atmosphere; wherein the lower port of the liquid supply main pipe (20) is arranged to be in communication with the atmosphere in an on-off manner; or, the lower port of the liquid supply main pipe (20) is closed, and the air venting position of the liquid supply main pipe (20) is arranged to be in communication with the atmosphere in an on-off manner; or, the lower port of the liquid supply main pipe (20) is arranged to be in communication with the atmosphere in an on-off manner, and the air venting position of the liquid supply main pipe (20) is arranged to be in communication with the atmosphere in an on-off manner; the air venting position is located above the plurality of communication ports (21).

2. The battery system of claim 1, wherein, The battery system further comprises a first air vent pipe (221), a first port of the first air vent pipe (221) being in communication with the lower port of the liquid supply main pipe (20), and a second port of the first air vent pipe (221) being in communication with the atmosphere; the first air vent pipe (221) being provided with a first control valve (22) to control the on-off state of the first air vent pipe (221) through the first control valve (22).

3. The battery system of claim 1, wherein, The battery system further comprises a second air vent pipe (231), a first end of the second air vent pipe (231) being connected to and in communication with the air venting position of the liquid supply main pipe (20), and a second port of the second air vent pipe (231) being in communication with the atmosphere; the second air vent pipe (231) being provided with a second control valve (23) to control the on-off state of the second air vent pipe (231) through the second control valve (23).

4. The battery system of claim 1, wherein, The liquid return pipeline (50) comprises a first pipe section (511) and a second pipe section (512); the drain port (32) of each of the plurality of battery packs (30) is in communication with a first port of the first pipe section (511), a second port of the first pipe section (511) is in communication with a liquid inlet (61) of the liquid storage component (60), a liquid outlet (62) of the liquid storage component (60) is in communication with a first port of the second pipe section (512), and a second port of the second pipe section (512) is in communication with a liquid return port (12) of the cooling device (10); The second pipe section (512) is provided with a pump body (5123) and a communication position downstream of the pump body (5123), and the communication position of the second pipe section (512) is provided with an air breakable communication with the atmosphere, so that the air breakable communication position of the liquid supply main pipe (20) with the atmosphere.

5. The battery system of claim 1, wherein, The lowermost battery pack (30) in the plurality of battery packs (30) is a bottom battery pack (301); the liquid return pipeline (50) comprises a first pipe section (511) and a second pipe section (512); The drain port (32) of each of the plurality of battery packs (30) is in communication with a first port of the first pipe section (511); the liquid return pipeline (50) further comprises a liquid return branch pipe (54), a first port of the liquid return branch pipe (54) is in communication with the drain port (32) of the bottom battery pack (301); a second port of the first pipe section (511) and a second port of the liquid return branch pipe (54) are both in communication with the liquid inlet (61) of the liquid storage component (60); a liquid outlet (62) of the liquid storage component (60) is in communication with a first port of the second pipe section (512), and a second port of the second pipe section (512) is in communication with the liquid return port (12) of the cooling device (10); The second pipe section (512) is provided with a pump body (5123) and a communication position downstream of the pump body (5123), and the communication position of the second pipe section (512) is provided with an air breakable communication with the atmosphere, so that the air breakable communication position of the liquid supply main pipe (20) with the atmosphere.

6. The battery system according to claim 4 or 5, characterized by The battery system further comprises a third air vent pipe (5121), a first end of the third air vent pipe (5121) is connected to and in communication with the communication position of the second pipe section (512), and a second port of the third air vent pipe (5121) is in communication with the atmosphere; the third air vent pipe (5121) is provided with a third control valve (5122) to control the on-off state of the third air vent pipe (5121) through the third control valve (5122).

7. The battery system of claim 1, wherein, The plurality of battery packs (30) are distributed in a vertical direction; the liquid storage component (60) is located below the plurality of battery packs (30); and the cooling device (10) is located above the plurality of battery packs (30).

8. The battery system of claim 1, wherein, Each of the communication ports (21) and the liquid inlet (31) of the corresponding battery pack (30) are communicated through a liquid inlet branch pipe (40); a one-way mechanism is arranged on each of the liquid inlet branch pipes (40) to make the liquid flowing out of each of the communication ports (21) flow to the liquid inlet (31) of the corresponding battery pack (30).

9. The battery system of claim 8, wherein, The one-way mechanism comprises a one-way valve (411); and / or The liquid inlet branch pipe (40) comprises a first branch pipe section (401), a second branch pipe section (402) and a third branch pipe section (403) connected in sequence, one end of the first branch pipe section (401) away from the second branch pipe section (402) is communicated with the corresponding communication port (21), one end of the third branch pipe section (403) away from the second branch pipe section (402) is communicated with the liquid inlet (31) of the corresponding battery pack (30); the height of one end of the first branch pipe section (401) connected with the second branch pipe section (402) is higher than the height of one end of the third branch pipe section (403) connected with the second branch pipe section (402) to form a raised structure; the one-way mechanism comprises the raised structure.

10. The battery system of claim 1, wherein, When the lower port of the liquid supply main pipe (20) is arranged to be openable and closable to the atmospheric environment, the battery system further comprises a liquid pumping pump (81), the lower port of the liquid supply main pipe (20) is communicated with the liquid inlet of the liquid pumping pump (81), and the liquid outlet of the liquid pumping pump (81) is communicated with the top opening of the liquid storage cavity.

11. A battery cabinet characterized by The battery system of any one of claims 1 to 10.

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