Stacked full-immersion energy storage device

Abstract

The utility model discloses a stackable full-immersion energy storage device which comprises a compartment body and a battery assembly installed in the compartment body. The battery assembly comprises at least one layer of battery pack; each layer of battery pack comprises a column of battery monomers arranged along the X direction, and tabs are respectively arranged on the front end surfaces and the rear end surfaces, vertical to the Y direction, of the battery monomers; a front temperature control flow channel, a rear temperature control flow channel, a left temperature control flow channel and a right temperature control flow channel which are mutually independent are respectively arranged between the front end surface, the rear end surface, the left side surface and the right side surface of the battery assembly and the compartment body; the front temperature control flow channel, the rear temperature control flow channel, the left temperature control flow channel and the right temperature control flow channel penetrate through the upper end and the lower end of the battery assembly; a gap is formed between every two adjacent battery monomers belonging to the same layer of battery packs, and a gap channel is formed in the battery assembly and penetrates through the upper end and the lower end of the battery assembly. And flowability control is carried out on different runners, so that the temperature control performance and the temperature equalization performance are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric energy storage, and specifically relates to a stacked fully immersed energy storage device. Background Art

[0002] Most of the existing fully immersed energy storage devices use a closed battery cabinet, and install the battery modules in the battery cabinet according to a certain arrangement. At the same time, an insulating temperature control medium is injected into the battery cabinet, so that the battery modules are immersed in the temperature control medium, and the temperature control medium and the battery module are used for heat exchange to achieve the purpose of temperature control. Specifically, some energy storage devices do not have a temperature control medium circulation system, but only inject the temperature control medium into the battery cabinet to immerse the battery module. Since the battery module is prone to local high temperature during operation, and the efficiency of heat conduction of the non-flowing temperature control medium is low, the local temperature continues to rise, the temperature control performance and the temperature uniformity performance are poor, and there is a risk of thermal runaway. Although some energy storage devices are equipped with a temperature control medium circulation system, due to the large volume and flow area of ​​the battery cabinet, the number of battery modules installed in the battery cabinet is also large, and the fluidity of the temperature control medium in the battery cabinet is poor, forming a dead zone where the temperature control medium does not flow in some areas, which will also increase the temperature of the temperature control medium in the local area, and the temperature control performance and the temperature uniformity performance are poor, and there is a risk of thermal runaway. Summary of the invention

[0003] In view of this, the purpose of the utility model is to provide a stacked fully immersed energy storage device, which can control the fluidity of different flow channels separately by arranging flow channels in zones, avoid dead zones, and improve temperature control performance and temperature uniformity performance.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] A stacked fully submerged energy storage device comprises a box and a battery assembly installed in the box; the battery assembly comprises at least one layer of battery packs; each layer of the battery packs comprises a row of battery cells arranged along the X direction, and the front end face and the rear end face of the battery cells perpendicular to the Y direction are respectively provided with pole ears;

[0006] The front face, rear face, left face and right face of the battery assembly are respectively provided with mutually independent front temperature control channels, rear temperature control channels, left temperature control channels and right temperature control channels between the compartment body; the front temperature control channels, rear temperature control channels, left temperature control channels and right temperature control channels all pass through the upper and lower ends of the battery assembly;

[0007] A gap is provided between two adjacent battery cells belonging to the battery pack of the same layer, and a gap channel is formed in the battery assembly, and the gap channel runs through the upper and lower ends of the battery assembly.

[0008] Furthermore, an annular flow channel is formed between the battery assembly and the compartment, and flow channel partitions are provided in the annular flow channel at four diagonal positions of the battery assembly respectively, and the flow channel partitions divide the annular flow channel into mutually independent front temperature control flow channel, rear temperature control flow channel, left temperature control flow channel and right temperature control flow channel.

[0009] Furthermore, gap partitions are provided at the front and rear ends of the gap respectively.

[0010] Furthermore, when the battery assembly includes at least two layers of the battery packs, an interlayer gap is provided between two adjacent layers of the battery packs, and first layer partitioning members for partitioning the annular flow channel are respectively provided at the front and rear ends of the interlayer gap.

[0011] Furthermore, the battery cells of each layer of the battery pack are arranged in the same manner, and in two adjacent layers of the battery pack, the battery cells of the battery pack of the upper layer are arranged in a one-to-one correspondence with the battery cells of the battery pack of the lower layer, and the battery cells of the upper layer are located directly above the corresponding battery cells of the lower layer.

[0012] Furthermore, in two adjacent layers of the battery pack, a second layer of partitioning members is provided between the corresponding two battery cells, and the second layer of partitioning members forms a plurality of gap branch channels in the gap channel, and the gap branch channels penetrate the upper and lower ends of the battery assembly.

[0013] Furthermore, a liquid inlet assembly is also provided in the compartment, and the liquid inlet assembly is located above or below the battery assembly.

[0014] Furthermore, the liquid inlet component includes a front liquid tank, a rear liquid tank, a left liquid tank, a right liquid tank and an intermediate liquid tank; the front liquid tank is connected to the front temperature control flow channel; the rear liquid tank is connected to the rear temperature control flow channel; the left liquid tank is connected to the left temperature control flow channel; the right liquid tank is connected to the right temperature control flow channel; the intermediate liquid tank is connected to the gap channel.

[0015] Furthermore, the liquid inlet assembly includes a front liquid inlet pipe, a rear liquid inlet pipe, a left liquid inlet pipe, a right liquid inlet pipe and a middle liquid inlet pipe; the front liquid inlet pipe is used to inject a temperature control medium into the front liquid tank; the rear liquid inlet pipe is used to inject a temperature control medium into the rear liquid tank; the left liquid inlet pipe is used to inject a temperature control medium into the left liquid tank; the right liquid inlet pipe is used to inject a temperature control medium into the right liquid tank; and the middle liquid inlet pipe is used to inject a temperature control medium into the middle liquid tank.

[0016] Furthermore, the front liquid inlet pipe, the rear liquid inlet pipe, the left liquid inlet pipe, the right liquid inlet pipe and the middle liquid inlet pipe are respectively provided with liquid inlet control valves for controlling the liquid inlet flow rate.

[0017] Furthermore, a liquid inlet diversion channel located in the X direction is provided in the middle of the intermediate liquid inlet bin, and liquid inlet diversion holes are provided in the liquid inlet diversion channel corresponding to the gap.

[0018] Furthermore, the liquid inlet component includes an intermediate liquid inlet pipe, and the intermediate liquid inlet pipe is used to inject temperature control medium into the liquid inlet diversion channel.

[0019] Furthermore, a liquid outlet assembly is also provided in the compartment; the liquid outlet assembly is located above or below the battery assembly.

[0020] Furthermore, a liquid inlet assembly is also provided in the compartment; the liquid inlet assembly is located above the battery assembly, and the liquid outlet assembly is located below the battery assembly; or, the liquid inlet assembly is located below the battery assembly, and the liquid outlet assembly is located above the battery assembly.

[0021] Furthermore, the liquid outlet component includes a front liquid outlet bin, a rear liquid outlet bin, a left liquid outlet bin, a right liquid outlet bin and a middle liquid outlet bin; the front liquid outlet bin is connected to the front temperature control flow channel; the rear liquid outlet bin is connected to the rear temperature control flow channel; the left liquid outlet bin is connected to the left temperature control flow channel; the right liquid outlet bin is connected to the right temperature control flow channel; the middle liquid outlet bin is connected to the gap channel.

[0022] Furthermore, the liquid outlet component includes a front liquid outlet pipe, a rear liquid outlet pipe, a left liquid outlet pipe, a right liquid outlet pipe and a middle liquid outlet pipe; the front liquid outlet pipe is used to discharge the temperature control medium in the front liquid outlet bin; the rear liquid outlet pipe is used to discharge the temperature control medium in the rear liquid outlet bin; the left liquid outlet pipe is used to discharge the temperature control medium in the left liquid outlet bin; the right liquid outlet pipe is used to discharge the temperature control medium in the right liquid outlet bin; and the middle liquid outlet pipe is used to discharge the temperature control medium in the middle liquid outlet bin.

[0023] Furthermore, the front liquid outlet pipe, the rear liquid outlet pipe, the left liquid outlet pipe, the right liquid outlet pipe and the middle liquid outlet pipe are respectively provided with liquid outlet control valves for controlling the liquid outlet flow rate.

[0024] Furthermore, the liquid outlet component also includes a liquid outlet main tank, and the front liquid outlet pipe, rear liquid outlet pipe, left liquid outlet pipe, right liquid outlet pipe and middle liquid outlet pipe are all connected to the liquid outlet main tank. The liquid outlet main tank is provided with a liquid outlet main pipe, and the liquid outlet main pipe is provided with a total liquid outlet control valve for controlling the flow rate.

[0025] Furthermore, a liquid outlet diversion channel located in the X direction is provided in the middle of the intermediate liquid outlet bin, and a liquid outlet confluence hole is provided in the liquid outlet diversion channel corresponding to the gap.

[0026] Furthermore, the liquid outlet component includes a middle liquid outlet pipe, and the middle liquid outlet pipe is connected to the liquid outlet diversion channel.

[0027] The beneficial effects of the utility model are:

[0028] The stacked fully submerged energy storage device of the utility model is provided with a row of battery cells arranged along the X direction in each layer of the battery pack, and pole ears are respectively provided on the front end face and the rear end face perpendicular to the Y direction of the battery cells; thus, by respectively providing mutually independent front temperature control flow channels, rear temperature control flow channels, left temperature control flow channels and right temperature control flow channels between the front end face, the rear end face, the left side face and the right side face of the battery assembly and the compartment body, the front end face and the rear end face provided with the pole ears in the battery assembly can be independently temperature controlled; in addition, the gap channels are formed by providing gaps between the battery cells in the battery assembly, and the side faces of each battery cell can be temperature-controlled. Temperature control is performed; in this way, the stacked fully immersed energy storage device of the utility model can independently control the flow rate of the temperature control medium in each flow channel by arranging independent front temperature control flow channels, rear temperature control flow channels, left temperature control flow channels, right temperature control flow channels and gap channels in the compartment and the battery assembly, and control the fluidity of each flow channel, which can reduce the flow area of ​​each flow channel and avoid problems such as insufficient fluidity and dead zones; in summary, the stacked fully immersed energy storage device of the utility model arranges the flow channels by partitions, so that the fluidity of different flow channels can be controlled separately, dead zones can be avoided, and the temperature control performance and temperature uniformity performance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model is described with the following drawings:

[0030] Figure 1 It is a full cross-sectional view of an embodiment of the stacked fully submerged energy storage device of the utility model along the X direction;

[0031] Figure 2 for Figure 1 AA section view;

[0032] Figure 3 for Figure 1 BB cross-sectional view;

[0033] Figure 4 for Figure 1 CC section view;

[0034] Figure 5 for Figure 1 DD cross-sectional view.

[0035] Description of reference numerals:

[0036] 10-compartment; 11-battery monomer; 12-ear; 13-front temperature control flow channel; 14-rear temperature control flow channel; 15-left temperature control flow channel; 16-right temperature control flow channel; 17-gap channel; 18-flow channel partition; 19-gap partition; 20-interlayer gap; 21-first layer partition; 22-second layer partition; 23-gap branch channel;

[0037] 30-liquid inlet assembly; 31-front liquid tank; 32-rear liquid tank; 33-left liquid tank; 34-right liquid tank; 35-middle liquid tank; 36-front liquid pipe; 37-rear liquid pipe; 38-left liquid pipe; 39-right liquid pipe; 40-middle liquid pipe; 41-liquid inlet control valve; 42-liquid inlet diversion channel; 43-liquid inlet diversion hole; 44-middle liquid inlet branch pipe;

[0038] 50-liquid outlet assembly; 51-front liquid outlet bin; 52-rear liquid outlet bin; 53-left liquid outlet bin; 54-right liquid outlet bin; 55-middle liquid outlet bin; 56-front liquid outlet pipe; 57-rear liquid outlet pipe; 58-left liquid outlet pipe; 59-right liquid outlet pipe; 60-middle liquid outlet pipe; 61-liquid outlet control valve; 62-liquid outlet diversion channel; 63-liquid outlet confluence hole; 64-middle liquid outlet branch pipe; 65-liquid outlet main bin; 66-liquid outlet main pipe; 67-total liquid outlet control valve. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0040] like Figure 1 As shown, the stacked fully submerged energy storage device of this embodiment includes a compartment 10 and a battery assembly installed in the compartment 10. The battery assembly includes at least one layer of battery packs, and each layer of battery packs includes a row of battery cells 11 arranged along the X direction. The front end face and the rear end face of the battery cells 11 perpendicular to the Y direction are respectively provided with pole ears 12. In this embodiment, the battery assembly includes 5 layers of battery packs. In some other embodiments, the number of layers of the battery pack can also be set to 1 layer, 2 layers, 3 layers, 4 layers, 6 layers and more than 6 layers, which will not be repeated. In this embodiment, the battery assembly includes all battery cells 11 installed in the compartment 10. The battery cells 11 are arranged in layers in the compartment 10, and the battery pack includes one layer of battery cells 11.

[0041] like Figure 2As shown, in this embodiment, the front face, rear face, left face and right face of the battery assembly are respectively provided with mutually independent front temperature control channels 13, rear temperature control channels 14, left temperature control channels 15 and right temperature control channels 16 between the compartment 10. The front temperature control channels 13, rear temperature control channels 14, left temperature control channels 15 and right temperature control channels 16 all pass through the upper and lower ends of the battery assembly, that is, the temperature control medium in the front temperature control channels 13, rear temperature control channels 14, left temperature control channels 15 and right temperature control channels 16 can flow downward from the upper end of the battery assembly to the lower end of the battery assembly, or the temperature control medium in the front temperature control channels 13, rear temperature control channels 14, left temperature control channels 15 and right temperature control channels 16 can also flow upward from the lower end of the battery assembly to the upper end of the battery assembly. In this embodiment, a gap is provided between two adjacent battery cells 11 belonging to the same layer of the battery pack and a gap channel 17 is formed in the battery assembly. The gap channel 17 runs through the upper and lower ends of the battery assembly, so that the temperature control medium in the gap channel 17 can flow downward from the upper end of the battery assembly to the lower end of the battery assembly, or the temperature control medium in the gap channel 17 can also flow upward from the lower end of the battery assembly to the upper end of the battery assembly.

[0042] Specifically, in this embodiment, a circular flow channel is formed between the battery assembly and the compartment 10, and flow channel partitions 18 are provided in the circular flow channel at four diagonal positions of the battery assembly, respectively. The flow channel partitions 18 divide the circular flow channel into mutually independent front temperature control flow channel 13, rear temperature control flow channel 14, left temperature control flow channel 15 and right temperature control flow channel 16. In this embodiment, gap partitions 19 are provided at the front and rear ends of the gap between two adjacent battery cells 11, respectively, and the gap partitions 19 separate the gap channel 17 from the front temperature control flow channel 13 and the rear temperature control flow channel 14, respectively.

[0043] Specifically, when the battery assembly includes at least two layers of battery packs, an interlayer gap 20 is provided between two adjacent layers of battery packs, and the front and rear ends of the interlayer gap 20 are respectively provided with a first layer of partitioning members 21 for partitioning the annular flow channel. In this embodiment, the arrangement of the battery cells 11 of each layer of battery packs is the same, and in two adjacent layers of battery packs, the battery cells 11 of the upper layer of battery packs are arranged one-to-one with the battery cells 11 of the lower layer of battery packs, and the battery cells 11 of the upper layer are located directly above the corresponding battery cells 11 of the lower layer. In this way, in two adjacent layers of battery packs, a second layer of partitioning members 22 is provided between the corresponding two battery cells 11, and the second layer of partitioning members 22 forms a plurality of gap branch channels 23 in the gap channel 17, and the gap branch channels 23 run through the upper and lower ends of the battery assembly, so that the flow area of ​​the gap branch channels 23 can be further reduced, and the fluidity of the temperature control medium in the gap branch channels 23 can be improved. By controlling the flow rate of the temperature control medium in different gap branch channels 23, the temperature of the battery cells 11 at different positions can also be adjusted, and the temperature uniformity performance can be further improved.

[0044] A liquid inlet assembly 30 is also provided in the compartment 10, and the liquid inlet assembly 30 is located above or below the battery assembly. The liquid inlet assembly 30 of this embodiment is located above the battery assembly, so that the temperature control medium can flow from top to bottom in the corresponding flow channel by gravity. Of course, in some other embodiments, the liquid inlet assembly 30 can also be arranged below the battery assembly, and at this time, a power element such as a pump can be used to drive the temperature control medium to flow in the corresponding flow channel from bottom to top. The liquid inlet assembly 30 of this embodiment includes a forward liquid tank 31, a rear liquid tank 32, a left liquid tank 33, a right liquid tank 34 and an intermediate liquid tank 35. Specifically, in this embodiment, the forward liquid tank 31 is connected to the front temperature control flow channel 13; the rear liquid tank 32 is connected to the rear temperature control flow channel 14; the left liquid tank 33 is connected to the left temperature control flow channel 15; the right liquid tank 34 is connected to the right temperature control flow channel 16; and the intermediate liquid tank 35 is connected to the gap channel 17. In this way, the temperature control medium can be injected into the front temperature control channel 13, the rear temperature control channel 14, the left temperature control channel 15, the right temperature control channel 16 and the gap channel 17 through the front liquid tank 31, the rear liquid tank 32, the left liquid tank 33, the right liquid tank 34 and the middle liquid tank 35 respectively.

[0045] In this embodiment, in order to respectively inject the temperature control medium into the front liquid tank 31, the rear liquid tank 32, the left liquid tank 33, the right liquid tank 34 and the middle liquid tank 35, the liquid inlet assembly further includes a front liquid inlet pipe 36, a rear liquid inlet pipe 37, a left liquid inlet pipe 38, a right liquid inlet pipe 39 and a middle liquid inlet pipe 40. The front liquid inlet pipe 36 is used to inject the temperature control medium into the front liquid tank 31; the rear liquid inlet pipe 37 is used to inject the temperature control medium into the rear liquid tank 32; the left liquid inlet pipe 38 is used to inject the temperature control medium into the left liquid tank 33; the right liquid inlet pipe 39 is used to inject the temperature control medium into the right liquid tank 34; and the middle liquid inlet pipe 40 is used to inject the temperature control medium into the middle liquid tank 35. In a preferred implementation manner of the present embodiment, a liquid inlet control valve 41 for controlling the liquid inlet flow rate is respectively provided on the front liquid inlet pipe 36, the rear liquid inlet pipe 37, the left liquid inlet pipe 38, the right liquid inlet pipe 39 and the middle liquid inlet pipe 40. In this way, the flow rate of the temperature control medium in the front liquid inlet pipe 36, the rear liquid inlet pipe 37, the left liquid inlet pipe 38, the right liquid inlet pipe 39 and the middle liquid inlet pipe 40 can be controlled by the liquid inlet control valve 41, thereby controlling the liquid inlet flow rate of the temperature control medium in the front temperature control channel 13, the rear temperature control channel 14, the left temperature control channel 15, the right temperature control channel 16 and the gap channel 17.

[0046] In a preferred implementation of this embodiment, a liquid inlet diversion channel 42 located in the X direction is provided in the middle of the intermediate liquid inlet bin 35, and liquid inlet diversion holes 43 are provided in the liquid inlet diversion channel 42 corresponding to the gap and the gap branch channel 23, and the intermediate liquid inlet pipe 40 is connected to the liquid inlet diversion channel 42. Specifically, the liquid inlet diversion hole 43 can be set at the bottom of the liquid inlet diversion channel 42, or on the side wall of the liquid inlet diversion channel 42. The liquid inlet diversion hole 43 of this embodiment can be set at the bottom of the liquid inlet diversion channel 42. The flow area of ​​the liquid inlet diversion hole 43 can be set according to actual needs, so that the liquid inlet flow rate of the temperature control medium in each gap branch channel 23 can be controlled separately, so that the temperature between different battery cells 11 in the same layer of battery pack is more uniform. Specifically, in the intermediate liquid inlet bin 35, the liquid inlet diversion channel 42 can be set to one, or can be set to two, three or more than three. In this embodiment, the liquid inlet diversion channels 42 are set to be three at intervals, and the intermediate liquid inlet branch pipe 44 connected to each of the liquid inlet diversion channels 42 is connected to the intermediate liquid inlet pipe 40.

[0047] A liquid outlet assembly 50 is also provided in the compartment 10, and the liquid outlet assembly is located above or below the battery assembly. When both the liquid inlet assembly 30 and the liquid outlet assembly 50 are provided in the compartment 10, the liquid inlet assembly 30 and the liquid outlet assembly 50 are respectively provided at the upper and lower ends of the battery assembly. Specifically, if the liquid inlet assembly 30 is located above the battery assembly, the liquid outlet assembly 50 is located below the battery assembly; if the liquid inlet assembly 30 is located below the battery assembly, the liquid outlet assembly 50 is located above the battery assembly. In this embodiment, the liquid inlet assembly 30 is located above the battery assembly, and the liquid outlet assembly 50 is located below the battery assembly.

[0048] In this embodiment, the liquid outlet assembly 50 includes a front liquid outlet bin 51, a rear liquid outlet bin 52, a left liquid outlet bin 53, a right liquid outlet bin 54 and a middle liquid outlet bin 55. The front liquid outlet bin 51 is connected to the front temperature control channel 13; the rear liquid outlet bin 52 is connected to the rear temperature control channel 14; the left liquid outlet bin 53 is connected to the left temperature control channel 15; the right liquid outlet bin 54 is connected to the right temperature control channel 16; and the middle liquid outlet bin 55 is connected to the gap channel 17. In this way, the temperature control medium in the front temperature control channel 13, the rear temperature control channel 14, the left temperature control channel 15, the right temperature control channel 16 and the gap channel 17 can be discharged through the front liquid outlet bin 51, the rear liquid outlet bin 52, the left liquid outlet bin 53, the right liquid outlet bin 54 and the middle liquid outlet bin 55 respectively.

[0049] In this embodiment, in order to discharge the temperature control medium in the front liquid outlet bin 51, the rear liquid outlet bin 52, the left liquid outlet bin 53, the right liquid outlet bin 54 and the middle liquid outlet bin 55, the liquid outlet assembly 50 of this embodiment includes a front liquid outlet pipe 56, a rear liquid outlet pipe 57, a left liquid outlet pipe 58, a right liquid outlet pipe 59 and a middle liquid outlet pipe 60. The front liquid outlet pipe 56 is used to discharge the temperature control medium in the front liquid outlet bin 51; the rear liquid outlet pipe 57 is used to discharge the temperature control medium in the rear liquid outlet bin 52; the left liquid outlet pipe 58 is used to discharge the temperature control medium in the left liquid outlet bin 53; the right liquid outlet pipe 59 is used to discharge the temperature control medium in the right liquid outlet bin 54; and the middle liquid outlet pipe 60 is used to discharge the temperature control medium in the middle liquid outlet bin 55.

[0050] In a preferred embodiment of the present embodiment, a liquid outlet control valve 61 for controlling the liquid outlet flow rate is respectively provided on the front liquid outlet pipe 56, the rear liquid outlet pipe 57, the left liquid outlet pipe 58, the right liquid outlet pipe 59 and the middle liquid outlet pipe 60. In this way, the flow rate of the temperature control medium in the front liquid outlet pipe 56, the rear liquid outlet pipe 57, the left liquid outlet pipe 58, the right liquid outlet pipe 59 and the middle liquid outlet pipe 60 can be controlled by the liquid outlet control valve 61, thereby controlling the liquid outlet flow rate of the temperature control medium in the front temperature control flow channel 13, the rear temperature control flow channel 14, the left temperature control flow channel 15, the right temperature control flow channel 16 and the gap channel 17.

[0051] The liquid outlet assembly 50 of this embodiment also includes a liquid outlet main tank 65, and the front liquid outlet pipe 56, the rear liquid outlet pipe 57, the left liquid outlet pipe 58, the right liquid outlet pipe 59 and the middle liquid outlet pipe 60 are all connected to the liquid outlet main tank 65. The liquid outlet main tank 65 is provided with a liquid outlet main pipe 66, and the liquid outlet main pipe 66 is provided with a total liquid outlet control valve 67 for controlling the flow rate.

[0052] In a preferred embodiment of the present embodiment, a liquid outlet shunt channel 62 located in the X direction is provided in the middle of the intermediate liquid outlet bin 55, and a liquid outlet confluence hole 63 is provided in the liquid outlet shunt channel 62 corresponding to the gap and the gap branch channel 23. Specifically, the liquid outlet confluence hole 63 of the present embodiment is arranged at the side bottom of the liquid outlet shunt channel 62. The flow area of ​​the liquid outlet confluence hole 63 can be set according to actual needs, so that the liquid outlet flow rate of the temperature control medium in each gap branch channel 23 can be controlled respectively, so that the temperature between different battery cells 11 in the same layer of battery pack is more uniform. Specifically, in the intermediate liquid outlet bin 55, the liquid outlet shunt channel 62 can be set to one, or it can be set to 2, 3 or more than 3. The liquid outlet shunt channel 62 of the present embodiment is set to 3 at intervals, and the intermediate liquid outlet branch pipe 64 connected to each liquid outlet shunt channel 62 is connected to the intermediate liquid outlet pipe 60.

[0053] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A stacked fully submerged energy storage device, characterized in that: It comprises a box and a battery assembly installed in the box; the battery assembly comprises at least one layer of battery packs; each layer of the battery packs comprises a row of battery cells arranged along the X direction, and the front end face and the rear end face of the battery cells perpendicular to the Y direction are respectively provided with pole ears; The front face, rear face, left face and right face of the battery assembly are respectively provided with mutually independent front temperature control channels, rear temperature control channels, left temperature control channels and right temperature control channels between the compartment body; the front temperature control channels, rear temperature control channels, left temperature control channels and right temperature control channels all pass through the upper and lower ends of the battery assembly; A gap is provided between two adjacent battery cells belonging to the battery pack of the same layer, and a gap channel is formed in the battery assembly, and the gap channel runs through the upper and lower ends of the battery assembly.

2. The stacked fully submerged energy storage device according to claim 1, characterized in that: An annular flow channel is formed between the battery assembly and the compartment, and flow channel partitions are provided in the annular flow channel at four diagonal positions of the battery assembly respectively. The flow channel partitions divide the annular flow channel into mutually independent front temperature control flow channel, rear temperature control flow channel, left temperature control flow channel and right temperature control flow channel.

3. The stacked fully submerged energy storage device according to claim 1, characterized in that: Gap partitioning pieces are respectively arranged at the front and rear ends of the gap.

4. The stacked fully submerged energy storage device according to claim 2, characterized in that: When the battery assembly includes at least two layers of the battery packs, an interlayer gap is provided between two adjacent layers of the battery packs, and the front and rear ends of the interlayer gap are respectively provided with first layer partitioning members for partitioning the annular flow channel.

5. The stacked fully submerged energy storage device according to claim 4, characterized in that: The battery cells of each layer of the battery pack are arranged in the same manner, and in two adjacent layers of the battery pack, the battery cells of the battery pack of the upper layer are arranged in a one-to-one correspondence with the battery cells of the battery pack of the lower layer, and the battery cells of the upper layer are located directly above the corresponding battery cells of the lower layer.

6. The stacked fully submerged energy storage device according to claim 5, characterized in that: In two adjacent layers of the battery pack, a second layer of partitioning members is provided between the corresponding two battery cells, and the second layer of partitioning members forms a plurality of gap branch channels in the gap channel, and the gap branch channels penetrate the upper and lower ends of the battery assembly.

7. The stacked fully submerged energy storage device according to claim 1, characterized in that: A liquid inlet assembly is also provided in the compartment, and the liquid inlet assembly is located above or below the battery assembly.

8. The stacked fully submerged energy storage device according to claim 7, characterized in that: The liquid inlet component includes a front liquid tank, a rear liquid tank, a left liquid tank, a right liquid tank and an intermediate liquid tank; the front liquid tank is connected to the front temperature control flow channel; the rear liquid tank is connected to the rear temperature control flow channel; the left liquid tank is connected to the left temperature control flow channel; the right liquid tank is connected to the right temperature control flow channel; the intermediate liquid tank is connected to the gap channel.

9. The stacked fully submerged energy storage device according to claim 8, characterized in that: The liquid inlet assembly includes a front liquid inlet pipe, a rear liquid inlet pipe, a left liquid inlet pipe, a right liquid inlet pipe and a middle liquid inlet pipe; the front liquid inlet pipe is used to inject temperature control medium into the front liquid bin; the rear liquid inlet pipe is used to inject temperature control medium into the rear liquid bin; the left liquid inlet pipe is used to inject temperature control medium into the left liquid bin; the right liquid inlet pipe is used to inject temperature control medium into the right liquid bin; the middle liquid inlet pipe is used to inject temperature control medium into the middle liquid bin.

10. The stacked fully submerged energy storage device according to claim 9, characterized in that: The front liquid inlet pipe, the rear liquid inlet pipe, the left liquid inlet pipe, the right liquid inlet pipe and the middle liquid inlet pipe are respectively provided with liquid inlet control valves for controlling the liquid inlet flow rate.

11. The stacked fully submerged energy storage device according to claim 8, characterized in that: A liquid inlet diversion channel located in the X direction is provided in the middle of the intermediate liquid inlet bin, and liquid inlet diversion holes are provided in the liquid inlet diversion channel corresponding to the gap.

12. The stacked fully submerged energy storage device according to claim 11, characterized in that: The liquid inlet assembly comprises an intermediate liquid inlet pipe, and the intermediate liquid inlet pipe is used to inject a temperature control medium into the liquid inlet diversion channel.

13. The stacked fully submerged energy storage device according to claim 1, characterized in that: The compartment is also provided with a liquid outlet assembly; the liquid outlet assembly is located above or below the battery assembly.

14. The stacked fully submerged energy storage device according to claim 13, characterized in that: A liquid inlet assembly is also provided in the compartment; the liquid inlet assembly is located above the battery assembly, and the liquid outlet assembly is located below the battery assembly; or, the liquid inlet assembly is located below the battery assembly, and the liquid outlet assembly is located above the battery assembly.

15. The stacked fully submerged energy storage device according to claim 13, characterized in that: The liquid outlet component includes a front liquid outlet bin, a rear liquid outlet bin, a left liquid outlet bin, a right liquid outlet bin and a middle liquid outlet bin; the front liquid outlet bin is connected to the front temperature control flow channel; the rear liquid outlet bin is connected to the rear temperature control flow channel; the left liquid outlet bin is connected to the left temperature control flow channel; the right liquid outlet bin is connected to the right temperature control flow channel; the middle liquid outlet bin is connected to the gap channel.

16. The stacked fully submerged energy storage device according to claim 15, characterized in that: The liquid outlet assembly includes a front liquid outlet pipe, a rear liquid outlet pipe, a left liquid outlet pipe, a right liquid outlet pipe and a middle liquid outlet pipe; the front liquid outlet pipe is used to discharge the temperature control medium in the front liquid outlet bin; the rear liquid outlet pipe is used to discharge the temperature control medium in the rear liquid outlet bin; the left liquid outlet pipe is used to discharge the temperature control medium in the left liquid outlet bin; the right liquid outlet pipe is used to discharge the temperature control medium in the right liquid outlet bin; and the middle liquid outlet pipe is used to discharge the temperature control medium in the middle liquid outlet bin.

17. The stacked fully submerged energy storage device according to claim 16, characterized in that: The front liquid outlet pipe, the rear liquid outlet pipe, the left liquid outlet pipe, the right liquid outlet pipe and the middle liquid outlet pipe are respectively provided with liquid outlet control valves for controlling the liquid outlet flow rate.

18. The stacked fully submerged energy storage device according to claim 16, characterized in that: The liquid outlet component also includes a liquid outlet main tank, and the front liquid outlet pipe, rear liquid outlet pipe, left liquid outlet pipe, right liquid outlet pipe and middle liquid outlet pipe are all connected to the liquid outlet main tank. The liquid outlet main tank is provided with a liquid outlet main pipe, and the liquid outlet main pipe is provided with a total liquid outlet control valve for controlling the flow rate.

19. The stacked fully submerged energy storage device according to claim 15, characterized in that: A liquid outlet diversion channel located in the X direction is provided in the middle of the intermediate liquid outlet bin, and a liquid outlet confluence hole is provided in the liquid outlet diversion channel corresponding to the gap.

20. The stacked fully submerged energy storage device according to claim 19, characterized in that: The liquid outlet component comprises a middle liquid outlet pipe, and the middle liquid outlet pipe is connected with the liquid outlet diversion channel.

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