Immersed energy storage battery pack

Abstract

The utility model provides an immersed energy storage battery pack, which relates to the technical field of energy storage containers, and comprises a box body, a battery module, an inlet pipe and an outlet pipe, at least two main runners communicated with each other are arranged in the box body; the battery module is arranged in the box body, the battery module is located between every two adjacent main flow channels, the battery module comprises a plurality of battery cells which are relatively fixed and arranged in an array, a microfluidic channel is arranged between every two adjacent battery cells, and the microfluidic channels are communicated with the main flow channels on the two sides of the battery module. According to the utility model, the main flow channel is arranged between the battery modules, and the cooling liquid is supplied to the two sides of the battery pack box body, so that the cooling liquid is discharged from the side surface of the box body to form a cooling liquid circulating cooling flow channel, and meanwhile, the micro-flow channels are arranged on the battery modules, so that the cooling liquid can take away heat generated by the battery cells more uniformly in the flowing process; the heat exchange area is effectively increased, and the thermal runaway risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of energy storage container technology, and in particular to an immersion energy storage battery pack. Background Technology

[0002] With the popularization of new energy applications, the safety and reliability of batteries, as core components of these applications, are receiving increasing attention. Prolonged operation or high-power charging and discharging can cause batteries to overheat. If heat is not dissipated in time, this can lead to the decomposition of internal materials, a rapid decline in battery life, and even battery explosions and fires. Therefore, effective heat dissipation for batteries is essential.

[0003] At present, most energy storage battery packs on the market are bottom-cooled. For example, the liquid cooling plate and battery pack with publication number CN114927793A have a large-size integrated design and can only be installed on the bottom wall of the battery pack. This one-sided cooling method has the problems of small cooling area, low heat exchange efficiency, and inability to effectively prevent thermal runaway in the event of thermal runaway. Utility Model Content

[0004] In view of this, the present invention proposes an immersion energy storage battery pack. By setting a main channel between the battery modules and supplying coolant on both sides of the battery pack housing, the coolant is discharged from the side of the housing, forming a coolant circulation cooling channel. At the same time, microflow channels are set on the battery modules, so that the coolant can more evenly remove the heat generated by the cells during the flow process, thereby effectively increasing the heat exchange area and reducing the risk of thermal runaway.

[0005] The technical solution of this utility model is achieved as follows: This utility model provides an immersion energy storage battery pack, including a housing, battery modules, inlet pipes, and outlet pipes, wherein...

[0006] The enclosure contains at least two interconnected main channels;

[0007] The battery module is housed inside the casing and is located between two adjacent main channels. The battery module includes several relatively fixed and arrayed cells. A microfluidic channel is provided between two adjacent cells and the microfluidic channel is connected to the main channels on both sides of the battery module.

[0008] The inlet pipe includes two inlet sections, which are respectively located at both ends of the housing and connected to both ends of each main channel. The inlet pipe is used to introduce coolant into the housing.

[0009] The outlet pipe is located outside the housing and between the two inlet sections. The outlet pipe connects to each main channel to allow the coolant inside the housing to flow outward.

[0010] Based on the above technical solutions, preferably, the housing includes a bottom plate, side panels and a top plate, the side panels have openings on both sides, the bottom plate and the top plate are respectively disposed on the two opening sides of the side panels, and cooperate with the side panels to form a sealed cavity, in which the battery module and the main channel are both disposed.

[0011] More preferably, the inlet pipe is disposed on the side panel, and the outlet pipe is disposed on the top plate.

[0012] Based on the above technical solutions, preferably, the inlet pipe further includes a connecting section, which connects the ends of the two inlet sections, so that the inlet pipe as a whole forms a C-shape.

[0013] Based on the above technical solutions, preferably, the entry section is provided with multiple liquid inlet sections, all of which are connected to the box body, and each liquid inlet section is arranged along the width direction of the box body.

[0014] Based on the above technical solutions, preferably, the outlet pipe includes a liquid outlet section, which is parallel to the inlet section, and the liquid outlet section is provided with multiple liquid outlet parts that connect to the box.

[0015] Based on the above technical solutions, preferably, the battery module further includes a separator, and the number of separators is multiple, and they are respectively disposed between two adjacent battery cells.

[0016] More preferably, the separator is provided with a liquid-passing groove, through which the microfluidic channel is formed between two adjacent cells.

[0017] More preferably, the liquid-passing channels are located on both sides of the separator and are staggered.

[0018] More preferably, the separator is T-shaped and extends from between two adjacent cells to the bottom of the two adjacent cells.

[0019] The immersion-type energy storage battery pack of this invention has the following advantages over the prior art:

[0020] (1) By setting a main channel between battery modules and supplying coolant on both sides of the battery pack box, the coolant is discharged from the side of the box to form a coolant circulation cooling channel. At the same time, micro-flow channels are set on the battery modules so that the coolant can carry away the heat generated by the cells more evenly during the flow process, thereby effectively increasing the heat exchange area and reducing the risk of thermal runaway.

[0021] (2) By setting up a liquid-passing tank and placing the liquid-passing tank on both sides of the separator and distributing them in an alternating manner, the coolant flowing in the main channel can enter between the two cells, thereby further increasing the heat exchange area between the cells and the coolant. The alternating distribution of the liquid-passing tank can improve the flow capacity of the coolant in the liquid-passing tank under the same thickness. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of the immersion energy storage battery pack of this utility model;

[0024] Figure 2 This is a side view of the immersion energy storage battery pack of this utility model without a top plate;

[0025] Figure 3 for Figure 2 Sectional view at point AA;

[0026] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point B in the diagram;

[0027] Figure 5 This is a perspective view of the separator of the immersion energy storage battery pack of this utility model;

[0028] Figure 6 This is a schematic diagram showing the connection between the side panel and the bottom plate of the immersion energy storage battery pack of this utility model.

[0029] Figure 7 This is a perspective view of the top plate of the immersion energy storage battery pack of this utility model. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] like Figure 1-7 As shown, the immersion energy storage battery pack of this utility model includes a housing 1, a battery module 2, an inlet pipe 3, and an outlet pipe 4.

[0032] The housing 1 has at least two interconnected main channels. The interior of the housing 1 is a sealed cavity. At the same time, the housing 1 has a confluence channel and a branch channel. After entering the housing 1, the coolant can flow into each main channel through the branch channel, while the coolant in each main channel flows out of the housing 1 together through the confluence channel.

[0033] The battery module 2 is installed inside the housing 1 and is located between two adjacent main channels. The battery module 2 includes several relatively fixed and arrayed cells 21. A microfluidic channel is provided between two adjacent cells 21. The microfluidic channel is connected to the main channels on both sides of the battery module 2. The cell 21 is the smallest unit that constitutes the entire energy storage system. Each battery module 2 is provided with multiple cells 21 arranged along the thickness direction. The arrangement direction of the cells 21 is the length direction of the battery module 2. End plates are provided on the opposite sides of the two outermost cells 21. Multiple cells 21 are fixed by setting cable ties or other locking structures between the two end plates to form the battery module 2.

[0034] To further illustrate this point, in this embodiment, the number of battery modules 2 is set to four, and they are arranged along their width. Each battery module 2 must be located on the same horizontal plane. Under this arrangement, the number of main channels is set to five, three of which are located between two adjacent battery modules 2, and the other two are respectively located between the two outermost battery modules 2 and the inner sidewall of the housing 1. As for the confluence channel and the branch channel provided in this embodiment, the branch channel is respectively located at both ends of each battery module 2, thereby connecting the five main channels. The confluence channel is located at the top of each battery module 2, so that the coolant can converge at the top.

[0035] The inlet pipe 3 includes two inlet sections 31, which are respectively located at both ends of the housing 1 and connected to both ends of each main channel. The inlet pipe 3 is used to introduce coolant into the housing 1. The two inlet sections 31 are respectively located on opposite sides of the housing 1, and both sides are the sides facing the end of the battery module 2. The two inlet sections 31 are respectively connected to two branch channels, and coolant is supplied to the end of the battery module 2 through the two branch channels.

[0036] The outlet pipe 4 is located outside the housing 1 and between the two inlet sections 31. The outlet pipe 4 connects to each main channel so that the coolant in the housing 1 flows outward. Specifically, the outlet pipe 4 is located at the top of the housing 1 and in the middle position, so that the coolant flowing into the two inlet sections 31 can be diverted to the main channel, then converge from the middle of the main channel and flow upward, and finally flow out of the housing 1 through the outlet pipe 4, realizing the circulation of coolant.

[0037] During the aforementioned coolant circulation process, the coolant temperature rise caused by the coolant flowing from one side of the housing 1 to the other side can be effectively avoided, which would increase the temperature difference between the cells 21 at different ends. This effectively reduces heat accumulation and also reduces the risk of thermal runaway.

[0038] In this embodiment, the container 1 is rectangular in shape. In the container energy storage system, the container 1 needs to be placed on the stand for stacking. The container 1 includes a bottom plate 11, side panels 12 and a top plate 13. The side panels 12 have openings on both sides. The bottom plate 11 and the top plate 13 are respectively located on the two opening sides of the side panels 12 and cooperate with the side panels 12 to form a sealed cavity. The battery module 2 and the main channel are both located in this sealed cavity.

[0039] The base plate 11 adopts a rigid frame, and plates are set on the frame. The side wall 12 is fixed to the base plate 11 by welding. Correspondingly, the top plate 13 can also be connected to the side wall 12 in this way, or a mating structure can be set to connect it with a sealing ring and bolts.

[0040] In a preferred embodiment, the inlet pipe 3 is disposed on the side panel 12, and the outlet pipe 4 is disposed on the top plate 13. More precisely, the two inlet sections 31 of the inlet pipe 3 are respectively disposed on both sides of the side panel 12. The two inlet sections 31 are arranged in a straight line and are parallel to each other. The length direction of the inlet section 31 is consistent with the width direction of the housing 1. The outlet pipe 4 is disposed in the middle of the top plate 13, so that the coolant entering the housing 1 through the two inlet sections 31 can flow a similar distance to leave the housing 1, thereby ensuring that the coolant evenly removes the heat of the battery cell 21 in the housing 1.

[0041] Furthermore, the inlet pipe 3 also includes a connecting section 32, which connects the ends of the two inlet sections 31, making the inlet pipe 3 as a whole form a C-shape. This arrangement takes into account that when the container body 1 is arranged inside the container, it is usually arranged in layers using brackets. By connecting the two inlet sections 31 through the connecting section 32, a total coolant delivery pipe can be connected to the connecting section 32 to simultaneously supply coolant to the two inlet sections 31. This arrangement also makes it easier to assemble the connecting section 32 and connect the pipeline.

[0042] The inlet section 31 is provided with multiple liquid inlet sections 311, all of which are connected to the housing 1. Each liquid inlet section 311 is arranged along the width direction of the housing 1. This arrangement allows the coolant entering the housing 1 through the inlet section 31 to undergo a diversion first, dispersing the inlet pressure and facilitating its flow into the main channels. Specifically, in the middle of this embodiment, each inlet section 31 is provided with four liquid inlet sections 311, which are arranged along the arrangement direction of the battery module 2. In addition to this arrangement, five liquid inlet sections 311 can also be provided, each facing the main channel.

[0043] Correspondingly, the outlet pipe 4 includes an outlet section 41, which is parallel to the inlet section 31. The outlet section 41 is provided with multiple outlet parts 411 that communicate with the housing 1. Through the multiple outlet parts 411, the coolant in the housing 1 can flow through the outlet section 41 to the outside of the housing 1 and participate in the circulation of the entire cooling system.

[0044] In this embodiment, the battery module 2 further includes a separator 22. There are multiple separators 22, which are respectively disposed between two adjacent cells 21. The separators 22 are used to reduce the pressure between each cell 21 and provide a certain degree of protection for the cells 21.

[0045] Specifically, in a preferred embodiment, the separator 22 is provided with a liquid-passing groove 221, which forms a microfluidic channel between two adjacent cells 21. The liquid-passing groove 221 allows the coolant flowing in the main channel to enter between the two cells 21, thereby further increasing the heat exchange area between the cells 21 and the coolant. In the prior art, foam is usually provided between the cells 21 for protection, while the separator 22 in this embodiment is preferably made of PA material.

[0046] Considering the limited thickness of the separator 22 and the fact that the cross-section of the liquid flow channel 221 will directly affect the heat exchange effect of the cell 21, it is preferable that the liquid flow channel 221 is arranged on both sides of the separator 22 and staggered, so as to improve the flow capacity of the coolant in the liquid flow channel 221 under the same thickness.

[0047] In order to allow cooling medium to pass through the bottom of the cell so that heat can be quickly removed in the event of thermal runaway at the bottom of the cell 21 and to prevent the blue film at the bottom of the cell 21 from burning through, the separator 22 is T-shaped and extends from between two adjacent cells 21 to the bottom of the two adjacent cells 21. This arrangement can further increase the heat exchange area between the cell 21 and the coolant and reduce the risk of thermal runaway of the battery pack as a whole.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An immersed energy storage battery pack, characterized by: The application relates to a battery cooling device, which comprises a box (1), a battery module (2), an inlet pipe (3) and an outlet pipe (4), wherein, At least two main flow channels are arranged in the box (1) and communicate with each other; The battery module (2) is arranged in the box (1) and located between two adjacent main flow channels, the battery module (2) comprises a plurality of fixed and arrayed battery cells (21), a micro flow channel is arranged between two adjacent battery cells (21), and the micro flow channel communicates with the main flow channels on both sides of the battery module (2); The inlet pipe (3) comprises two inlet sections (31), the two inlet sections (31) are arranged at two ends of the box (1) respectively and communicate with the two ends of each main flow channel respectively, and the inlet pipe (3) is used for introducing cooling liquid into the box (1); The outlet pipe (4) is arranged outside the box (1) and located between the two inlet sections (31), and the outlet pipe (4) communicates with each main flow channel so that the cooling liquid in the box (1) flows outwards.

2. The submerged energy storage battery pack of claim 1, wherein: The box (1) comprises a bottom plate (11), a side wall (12) and a top plate (13), the side wall (12) is open on both sides, the bottom plate (11) and the top plate (13) are arranged on the two open sides of the side wall (12) respectively and cooperate with the side wall (12) to form a sealed cavity, and the battery module (2) and the main flow channels are arranged in the sealed cavity.

3. The submerged energy storage battery pack of claim 2, wherein: The inlet pipe (3) is arranged on the side wall (12), and the outlet pipe (4) is arranged on the top plate (13).

4. The submerged energy storage battery pack of claim 1, wherein: The inlet pipe (3) further comprises a connecting section (32), the connecting section (32) connects the end portions of the two inlet sections (31) so that the inlet pipe (3) forms a C-shaped whole.

5. The submerged energy storage battery pack of claim 1, wherein: A plurality of liquid inlet portions (311) are arranged on the inlet section (31), the plurality of liquid inlet portions (311) all communicate with the box (1), and each liquid inlet portion (311) is arranged along the width direction of the box (1).

6. The submerged energy storage battery pack of claim 1, wherein: The outlet pipe (4) comprises a liquid outlet section (41), the liquid outlet section (41) is parallel to the inlet section (31), and a plurality of liquid outlet portions (411) which communicate with the box (1) are arranged on the liquid outlet section (41).

7. The submerged energy storage battery pack of claim 1, wherein: The battery module (2) further comprises a plurality of partition pieces (22), and each partition piece (22) is arranged between two adjacent battery cells (21).

8. The submerged energy storage battery pack of claim 7, wherein: A liquid passing groove (221) is arranged on the partition piece (22), and the micro flow channel is formed between the two adjacent battery cells (21) through the liquid passing groove (221).

9. The submerged energy storage battery pack of claim 8, wherein: The liquid passing grooves (221) are arranged on both sides of the partition piece (22) and are staggered.

10. The submerged energy storage battery pack of claim 7, wherein: The partition piece (22) is arranged in a T-shaped mode and extends from between two adjacent battery cells (21) to the bottom of the two adjacent battery cells (21).

Images