Thermal insulation, submerged battery tank and energy storage device

Abstract

A kind of heat insulation, submerged battery box and energy storage device, heat insulation is applied to submerged battery box, submerged battery box is filled with insulating coolant, heat insulation includes main plate and vice plate, main plate is opened with main flow passage, main flow passage is communicated with external space;Vice plate is connected to main plate, vice plate is opened with branch flow passage, branch flow passage and main flow passage are communicated, the number of vice plate is multiple, and there is a placing space between two vice plates on the same side of main plate, and the placing space is used to place battery.The heat insulation can solve the problem that the heat is concentrated between the batteries in the submerged battery box without isolation, and the insulating coolant cannot play a role.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, specifically to a heat insulation component, an immersion battery box, and an energy storage device. Background Technology

[0002] Immersion liquid cooling technology for energy storage involves directly immersing the battery in an insulating coolant. Utilizing the liquid's high thermal conductivity, it directly contacts the battery for heat exchange, rapidly absorbing the heat generated during charging and discharging and transferring it to an external circulation system for cooling. This reduces the risk of localized overheating, lowers the battery's peak temperature, and helps reduce the temperature gradient, thereby extending battery life and improving the overall safety and operating efficiency of the system.

[0003] However, existing submersible battery packs simply place the batteries in a battery box, and the contact between the batteries prevents heat from being effectively transferred. The heat generated by the batteries is concentrated between the batteries, and the insulating coolant cannot fully exert its liquid cooling effect. Utility Model Content

[0004] The purpose of this invention is to provide a heat insulation component, an immersion battery box, and an energy storage device to solve the problem that the lack of battery isolation in an immersion battery box leads to heat concentration between the batteries, while the insulating coolant cannot function.

[0005] To achieve the objectives of this utility model, the following technical solution is provided:

[0006] In a first aspect, this utility model provides a heat insulation component applied to an immersion battery box filled with insulating coolant. The heat insulation component includes a main board and a sub-board. The main board has a main channel that connects to an external space. The sub-board is connected to the main board and has branch channels that connect to the main channel. There are multiple sub-boards, and a placement space is provided between two sub-boards located on the same side of the main board for placing batteries.

[0007] In some embodiments, the motherboard includes a first side and a second side facing away from each other, and the plurality of sub-boards include a first sub-board and a second sub-board, the first sub-board being connected to the first side, the second sub-board being connected to the second side, and the first sub-board and the second sub-board having a non-zero included angle α.

[0008] In some embodiments, the heat insulation component further includes a partition plate connecting the main board and the sub-board, the partition plate dividing the placement space into a first space and a second space, the first space being used to place the battery and the second space being used to contain the insulating coolant.

[0009] In some embodiments, the branch channel includes multiple branch sub-channels, which are arranged in parallel and are all connected to the main channel.

[0010] In some embodiments, the main board has a first cross-section along the direction perpendicular to the main flow channel, and the area of ​​the opening of the main flow channel to the area of ​​the first cross-section is M; the secondary board has a second cross-section along the direction perpendicular to the branch flow channel, and the area of ​​the branch flow channel to the area of ​​the second cross-section is N, wherein M:N = 1:(0.5~0.7).

[0011] In some embodiments, the surface where the inlet of the main channel is located has a first inner wall angle with the inner wall surface of the main channel, the first inner wall angle being greater than or equal to 90°; and / or, the surface where the inlet of the branch channel is located has a second inner wall angle with the inner wall surface of the branch channel, the second inner wall angle being greater than or equal to 90°.

[0012] In some embodiments, the thermal insulation includes a first coating located on the inner wall of the main flow channel and / or the branch flow channel, the first coating being used to improve the hydrophobicity of the inner wall of the thermal insulation.

[0013] In some embodiments, the thermal insulation component includes a second coating located on the outer surface of the main board and / or the sub-board, the second coating being used to improve the thermal conductivity of the outer surface of the thermal insulation component.

[0014] Secondly, the present invention provides an immersion battery box, including a box body and a heat insulation component as described in any one of the embodiments of the first aspect, wherein the box body encloses a receiving space, the heat insulation component is received in the receiving space, and the main flow channel and the branch flow channel are both connected to the receiving space.

[0015] In some embodiments, the submersible battery box further includes a baffle that surrounds and connects to the heat insulation member, and the baffle has a liquid guide hole that connects to the inlet of the branch channel and the receiving space.

[0016] In some embodiments, the surface where the liquid guide hole is located has a third inner wall angle with the inner wall surface of the liquid guide hole, and the third inner wall angle is greater than or equal to 90°.

[0017] In some embodiments, the enclosure component includes two large-face connecting sections and a bent section. The two large-face connecting sections are arranged opposite to each other along a first direction, the bent section extends in a bent manner along the first direction, and the two large-face connecting sections are respectively connected to the two ends of the bent section that are opposite to each other along the first direction.

[0018] In some embodiments, the bent section includes an orifice plate and a mating plate, the orifice plate and the mating plate being connected at an included angle, the orifice plate having the liquid guiding hole, the orifice plate being connected to the side where the inlet of the branch flow channel is located, and the mating plate being connected to the large side of the sub-plate.

[0019] In some embodiments, the housing includes a first wall panel and a second wall panel disposed opposite to each other along a first direction. The first wall panel has an inlet hole, the inlet of the main channel faces the first wall panel, and the outlet of the main channel faces the second wall panel. The enclosure has a first gap and a second gap disposed opposite to each other along the first direction. The first gap is located between the inlet of the main channel and the first wall panel, and the second gap is located between the outlet of the main channel and the second wall panel.

[0020] In some embodiments, the enclosure includes a first enclosure and a second enclosure, the first enclosure and the second enclosure are arranged at a distance from each other along a second direction, the gap between the first enclosure and the second enclosure near the first wall panel is the first gap, and the gap between the first enclosure and the second enclosure near the second wall panel is the second gap.

[0021] Thirdly, the present invention provides an energy storage device, including a battery and an immersion battery box as described in any one of the embodiments of the second aspect, wherein the battery is housed in the immersion battery box.

[0022] The heat insulation component for an immersion battery box provided by this utility model includes a main board and multiple sub-boards. There is a placement space between two adjacent sub-boards, which can be used to place a battery. In this way, multiple batteries in the immersion battery box can be separated by combining the main board and sub-boards, and the main board and sub-boards are used to separate and insulate the batteries. At the same time, this utility model also opens a main flow channel in the main board and branch flow channels in the sub-boards, so that the insulating coolant in the immersion battery box can flow into the heat insulation component. The heat exchange of the insulating coolant is used to conduct heat to the heat insulation component. Therefore, the heat transferred from the battery to the heat insulation component can be discharged through the insulating coolant in the flow channels, thereby increasing the synergy of heat insulation and directional cooling between batteries. Attached Figure Description

[0023] 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.

[0024] Figure 1This is an external view of an energy storage device according to one implementation method;

[0025] Figure 2 This is an internal structural diagram of an energy storage device according to one implementation method;

[0026] Figure 3 This is an external view of a battery and heat insulation component according to one embodiment;

[0027] Figure 4 This is an external view of a heat insulation component according to one embodiment;

[0028] Figure 5 This is a top view of a heat insulation component according to one embodiment;

[0029] Figure 6 This is a schematic diagram of a first cross-section of the motherboard and a second cross-section of the sub-board in one embodiment;

[0030] Figure 7 This is a schematic cross-sectional view of the motherboard at the main channel inlet in one implementation method;

[0031] Figure 8 This is an external view of one embodiment of the thermal insulation component and enclosure component;

[0032] Figure 9 This is an external view of the enclosure and fencing components according to one implementation method.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1-Energy storage device,

[0035] 10-Immersion battery box, 20-Battery,

[0036] 100-Box body, 101-Box cover, 102-Reception space, 103-First wall panel, 104-Second wall panel, 105-Liquid inlet, 105S-Liquid inlet pipe;

[0037] 200 - Thermal insulation component; 201 - Main board; 202 - Main flow channel; 203 - First side; 204 - Second side; 205 - Third side; 206 - Fourth side; 207 - First cross-section; 208 - Sub-plate; 209 - Branch flow channel; 210 - Branch sub-flow channel; 211 - First sub-plate; 212 - Second sub-plate; 213 - Second cross-section; 214 - Placement space; 215 - First space; 216 - Second space; 217 - Partition plate; 218 - First coating; 219 - Second coating.

[0038] 300 - Enclosure component, 301 - Liquid guide hole, 302 - Large surface connecting section, 303 - Bending section, 303A - Orifice plate, 303B - Mating plate, 304 - First enclosure component, 305 - Second enclosure component, 306 - First gap, 307 - Second gap

[0039] 001 - First direction, 002 - Second direction, 003 - Third direction, 004 - Fourth direction, 005 - Fifth direction. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0042] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0043] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0044] This utility model provides an immersion battery box 10, please refer to... Figure 1 and Figure 2 The energy storage device 1 is used in a submerged battery box 10, which houses multiple batteries 20. The batteries 20 and the submerged battery box 10 together constitute the energy storage device 1. The energy storage device 1 is used to supply power to electrical equipment. The submerged battery box 10 is filled with insulating coolant. Specifically, the batteries 20 are square batteries.

[0045] For some implementation methods, please refer to Figure 1 and Figure 2The submersible battery box 10 includes a cover 101, a body 100, and a heat insulation element 200. The body 100 encloses a receiving space 102 and has an opening for placing the heat insulation element 200 and the battery 20. The cover 101 closes the opening to isolate the receiving space 102 from the outside. The heat insulation element 200 is housed in the receiving space 102 and is used to divide the receiving space 102 into independent placement spaces 214 for placing a single battery 20.

[0046] In a specific embodiment, the box 100 can be hexahedral in shape, specifically a cuboid. The box 100 includes an outer peripheral wall composed of four side plates connected end to end; the box 100 also includes a bottom plate, which is rectangular, with one side of the bottom plate connected to the four side plates, and an opening opposite the bottom plate. The box cover 101 is connected to the opening and is disposed opposite to the bottom plate.

[0047] In a specific embodiment, the box body 100 has a length direction, a width direction, and a height direction, wherein the direction in which the box cover 101 is disposed opposite to the bottom plate is the height direction. For ease of description, the first direction 001 in the following text refers to the length direction, the second direction 002 refers to the width direction, and the third direction 003 refers to the height direction.

[0048] For some implementation methods, please refer to Figures 3-5 The heat insulation component 200 includes a main board 201 and a sub-board 208. The main board 201 has a main channel 202 that connects to the external space. The sub-board 208 is connected to the main board 201 and has a branch channel 209 that connects to the main channel 202. There are multiple sub-boards 208. There is a placement space 214 between two sub-boards 208 located on the same side of the main board 201. The placement space 214 is used to place the battery 20.

[0049] In a specific embodiment, both the main board 201 and the sub-board 208 are flat structures. The main board 201 extends linearly along the first direction 001 in the housing 100. The main board 201 includes a first surface 203 and a second surface 204 that are opposite to each other along its thickness direction. The first surface 203 and the second surface 204 are the largest surfaces on the main board 201. The first surface 203 and the second surface 204 both face the outer peripheral wall of the housing 100.

[0050] In a specific embodiment, the main channel 202 of the motherboard 201 extends in a straight line along the first direction 001. The main channel 202 includes an inlet and an outlet, which are arranged opposite to each other along the first direction 001. It can be understood that the motherboard 201 has a hollow structure, and the internal space of the motherboard 201 is the main channel 202. The main channel 202 has an inlet and an outlet to connect to the external space (accommodation space 102).

[0051] In a specific embodiment, the sub-board 208 extends linearly within the housing 100 along a direction other than the first direction 001; that is, the sub-board 208 does not extend along the first direction 001. Optionally, the sub-board 208 may extend linearly along a second direction 002, or along other directions. Thus, the sub-board 208 intersects with the main board 201. The main board 201 and the sub-board 208 have the same height in a third direction 003.

[0052] In a specific embodiment, the branch flow channel 209 of the sub-board 208 extends in a straight line, and the extension direction of the branch flow channel 209 intersects the extension direction of the main flow channel 202. The branch flow channel 209 includes an inlet and an outlet, which are arranged opposite to each other along its extension direction. The outlet of the branch flow channel 209 connects to the main flow channel 202, that is, the outlet of the branch flow channel 209 is located at the connection between the main board 201 and the sub-board 208. It can be understood that the sub-board 208 is also a hollow structure, and the internal space of the sub-board 208 is the branch flow channel 209, and the inlet of the branch flow channel 209 connects to the external space (accommodation space 102).

[0053] In a specific embodiment, there are multiple sub-boards 208, which are respectively arranged on opposite sides of the main board 201, meaning that multiple sub-boards 208 are connected to the same side of the main board 201. The multiple sub-boards 208 located on the same side of the main board 201 are arranged in parallel, and there is a gap between each pair of sub-boards 208; this gap is the placement space 214. It is understood that the battery 20 is a cubic battery 20, so two parallel sub-boards 208 can connect to the large surface of the battery 20, thereby confining the battery 20 within the placement space 214. The number of batteries placed in any one placement space 214 can be one or more.

[0054] In other embodiments, there are multiple sub-boards 208, all of which are disposed on one side of the main board 201, meaning that the main board 201 is connected to multiple sub-boards 208 on only one side. The arrangement of the multiple sub-boards 208 can refer to the above embodiments and will not be repeated here.

[0055] The heat insulation component 200 provided by this utility model for use in an immersion battery box 10 includes a main board 201 and multiple sub-boards 208. There is a placement space 214 between two adjacent sub-boards 208, which can be used to place a battery 20. In this way, the multiple batteries 20 in the immersion battery box 10 can be separated by the combination of the main board 201 and the sub-boards 208, and the batteries 20 are separated and insulated by the main board 201 and the sub-boards 208. At the same time, this utility model also provides a main flow channel 202 in the main board 201 and a branch flow channel 209 in the sub-boards 208, so that the insulating coolant in the immersion battery box 10 can flow into the heat insulation component 200. The heat exchange of the insulating coolant is used to conduct heat to the heat insulation component 200. Therefore, the heat transferred from the battery 20 to the heat insulation component 200 can be discharged through the insulating coolant in the flow channel, thereby increasing the synergy of heat insulation and directional cooling between the batteries 20.

[0056] For some implementation methods, please refer to Figures 3-5 The motherboard 201 includes a first side 203 and a second side 204 facing away from each other. Multiple sub-boards 208 include a first sub-board 211 and a second sub-board 212. The first sub-board 211 is connected to the first side 203, and the second sub-board 212 is connected to the second side 204. The first sub-board 211 and the second sub-board 212 have a non-zero included angle α; optionally, 120°≤α≤130°.

[0057] In a specific embodiment, when the heat insulation component 200 is placed in the housing 100, the main board 201 includes a first surface 203 and a second surface 204 that are opposite to each other along the second direction 002. The first surface 203 is connected to multiple first sub-boards 211, and the second surface 204 is connected to multiple second sub-boards 212. The multiple first sub-boards 211 are arranged in parallel, and the multiple second sub-boards 212 are arranged in parallel.

[0058] In a specific embodiment, the first sub-plate 211 extends along the fourth direction 004, and the second sub-plate 212 extends along the fifth direction 005. The fourth direction 004 intersects with the first direction 001 and the second direction 002, respectively, and the fifth direction 005 intersects with the first direction 001 and the second direction 002, respectively. The branch flow channel 209 on the first sub-plate 211 can extend along the fourth direction 004 and connect with the main flow channel 202, and the branch flow channel 209 on the second sub-plate 212 can extend along the fifth direction 005 and connect with the main flow channel 202.

[0059] In a specific embodiment, the first sub-plate 211 and the second sub-plate 212 are axially symmetrically arranged relative to the main plate 201, that is, the angle O1 between the fourth direction 004 and the first direction 001, and the angle O2 between the fifth direction 005 and the first direction 001, satisfy O1 = O2. Optionally, the heat insulation component 200 has a fishbone-like structure, that is, the main plate 201 is the main skeleton, and the first sub-plate 211 and the second sub-plate 212 together form the ribs. The battery 20 is placed obliquely in the placement space 214. It can be understood that the first sub-plate 211 and the second sub-plate 212 are obliquely connected to the main plate 201. Therefore, the battery 20 constrained by the first sub-plate 211 and the second sub-plate 212 is also placed obliquely in the placement space 214.

[0060] In a specific embodiment, the first sub-plate 211 and the second sub-plate 212 have an included angle α, that is, the included angle between the fourth direction 004 and the fifth direction 005 is α. α can satisfy α=O1+O2, 120°≤α≤130°. Optionally, the included angle α can be 120°, 121°, 122°, 123°, 124°, 125°, 126°, 127°, 128°, 129°, or 130°.

[0061] This invention, by setting the first sub-plate 211 and the second sub-plate 212 to have an included angle α, and the included angle α satisfies 120° to 130°, makes the first sub-plate 211 and the second sub-plate 212 on both sides of the main board 201 not parallel. This is more conducive to the flow of insulating coolant in the branch channel 209 to the main channel 202 and out through the outlet of the main channel 202. The heat on the sub-plate 208 is exchanged to the main channel 202 through the obliquely set branch channel 209. In addition, the included angle between the first sub-plate 211 and the second sub-plate 212 helps to reduce the pressure formed by the insulating coolant, reducing the pressure drop by 60% and improving the flow uniformity of the insulating coolant by 40%.

[0062] For some implementation methods, please refer to Figure 4 and Figure 5 The heat insulation component 200 also includes a partition plate 217, which connects the main board 201 and the sub-board 208. The partition plate 217 divides the placement space 214 into a first space 215 and a second space 216. The first space 215 is used to place the battery 20, and the second space 216 is used to contain insulating coolant. The second space 216 is closer to the main board 201 than the first space 215.

[0063] In a specific embodiment, the partition plate 217 is also of a flat plate structure, and the height of the partition plate 217 is the same as that of the main plate 201 and the auxiliary plate 208. The partition plate 217, the main plate 201 and the auxiliary plate 208 may be of an integrated structure. The opposite ends of the partition plate 217 in the sixth direction are connected to the main plate 201 and the auxiliary plate 208 respectively. It can be understood that the heat insulator 200 is an axisymmetric structure, so partition plates 217 are arranged on both opposite surfaces of the main plate 201, and one of the partition plates 217 is taken as the description object below.

[0064] In a specific embodiment, the partition plate 217 is arranged in the placement space 214 and close to the main plate 201. The partition plate 217, the main plate 201 and the auxiliary plate 208 together enclose a second space 216. Since the partition plate 217, the main plate 201 and the auxiliary plate 208 are all plate-shaped, the second space 216 may be a triangular prism-shaped space. The side of the partition plate 217 facing away from the main plate 201 is a first space 215. The partition plate 217 is used for connecting the side surface of the battery 20.

[0065] In a specific embodiment, the main plate 201, the partition plate 217 and the main plate 201 together form a "△" shaped structure. The partition plate 217 and two adjacent auxiliary plates 208 together form a "匚" shaped structure. It can be understood that the auxiliary plate 208 and the main plate 201 are connected obliquely, so the placement space 214 formed together by the main plate 201 and two adjacent auxiliary plates 208 is a right trapezoid, and the partition plate 217 divides the placement space 214 into a triangular second space 216 and a rectangular first space 215, so that the first space 215 can be adapted to the shape of the battery 20.

[0066] By adding the partition plate 217, the present utility model, on one hand, can adapt to the shape of the square battery 20, so that the partition plate 217 and the two auxiliary plates 208 can jointly clamp the battery 20; on the other hand, the second space 216 divided by the partition plate 217 can be used to accommodate insulating cooling liquid, so that heat insulation of the insulating cooling liquid and the partition plate 217 is added between the main plate 201 and the battery 20, thereby ensuring that the heat converged from the branch flow channels 209 to the main flow channel 202 will not be reversely transferred to the battery 20 again.

[0067] In some embodiments, please refer to Figure 4 and Figure 5 , the branch flow channel 209 includes a plurality of branch sub-channels 210, the plurality of branch sub-channels 210 are arranged in parallel, and the plurality of branch sub-channels 210 are all in communication with the main flow channel 202. Specifically, the plurality of branch sub-channels 210 are arranged in parallel, that is, the plurality of branch sub-channels 210 all extend along the fourth direction 004 (or the fifth direction 005) and communicate with the main flow channel 202.

[0068] In a specific embodiment, the inlets of the multiple branch sub-channels 210 are all located on the same surface of the sub-plate 208, so the insulating coolant can flow from the multiple branch sub-channels 210 into the main channel 202. The spacing between the multiple branch sub-channels 210 can be the same. The opening shape and size of the multiple branch sub-channels 210 can be the same.

[0069] This invention increases the flow rate of insulating coolant in the sub-plate 208 by setting branch flow channels 209 including multiple branch sub-flow channels 210, thereby ensuring efficient heat exchange for the battery 20. The multiple branch sub-flow channels 210 can also enhance the effect of directional cooling, and the insulating coolant can flow and exchange heat fully in the sub-plate 208.

[0070] For some implementation methods, please refer to Figure 6 Along the direction perpendicular to the main flow channel 202, the main plate 201 has a first cross section 207, and the ratio of the opening area of ​​the main flow channel 202 to the area of ​​the first cross section 207 is M; along the direction perpendicular to the branch flow channel 209, the secondary plate 208 has a second cross section 213, and the ratio of the area of ​​the branch flow channel 209 to the area of ​​the second cross section 213 is N, where M:N = 1:(0.5~0.7).

[0071] In a specific embodiment, the main flow channel 202 extends along the first direction 001, so a cross-sectional processing of the main board 201 along the second direction 002 yields a first cross-section 207 of the main board 201. The branch flow channel 209 extends along the fourth direction 004 (or the fifth direction 005), so a cross-sectional processing of the sub-board 208 along the perpendicular fourth direction 004 yields a second cross-section 213 of the sub-board 208. It can be understood that the above cross-sectional methods can all be considered as cross-sections obtained along the thickness direction of the main board 201 and the sub-board 208.

[0072] In a specific embodiment, the area of ​​the cross-section (first section 207) of the main board 201 can be m1, and the opening area of ​​the main flow channel 202 on the cross-section can be m2, where M = m2 / m1. The area of ​​the cross-section (second section 213) of the sub-board 208 can be n1, and the opening area of ​​the branch flow channel 209 on the cross-section can be n2, where N = n2 / n1.

[0073] In a specific embodiment, the opening area n2 of the branch channel 209 on the cross-section refers to the sum of the opening areas of the multiple branch sub-channels 210. It can be understood that the proportion of the sum of the opening areas of the multiple branch sub-channels 210 on the second cross-section 213 is less than the proportion of the opening area of ​​the main channel 202 on the first cross-section 207; that is, the diameter of the main channel 202 is larger. Optionally, M:N can be 1:0.5, 1:0.55, 1:0.6, 1:0.65, or 1:0.7.

[0074] This invention ensures that a sufficient liquid flow environment can be formed in the main channel 202 by setting the opening ratio of the branch channel 209 to be smaller than that of the main channel 202. More insulating coolant flows in through the inlet of the main channel 202 and merges with the insulating coolant flowing in through the branch channel 209, thus achieving the effects of heat exchange and flow guidance for the insulating coolant in the main channel 202.

[0075] In some embodiments, the total number of branch channels 210 on multiple sub-plates 208 in the heat insulation component 200 is 96 to 160. Specifically, the number of sub-plates 208 on the heat insulation component 200 can be X, and each sub-plate 208 can have Y branch channels 210, so the sum of the branch channels 210 on multiple sub-plates 208 is Z = X * Y. In a specific embodiment, the number of sub-plates 208 on the heat insulation component 200 can be 16, and each sub-plate 208 can have 8 branch channels 210, so preferably 128 channels.

[0076] Optionally, the sum of the branch sub-channels 210 on the multiple sub-plates 208 can be 96, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, or 160.

[0077] In some embodiments, the main flow channel 202 has a quadrilateral cross-sectional shape with dimensions of (12-18) mm * (105-120) mm. The branch flow channel 210 also has a quadrilateral cross-sectional shape with dimensions of (4-8) mm * (6-13) mm. Specifically, the cross-sectional dimensions of the branch flow channel 210 are smaller than those of the main flow channel 202, thereby giving the main flow channel 202 a larger ventilation area, allowing the airflow from the branch flow channel 210 to converge within the main flow channel 202.

[0078] Optionally, the cross-sectional dimensions of the main channel 202 can be 12mm*(105~120)mm, 13mm*(105~120)mm, 14mm*(105~120)mm, 15mm*(105~120)mm, 16mm*(105~120)mm, 17mm*(105~120)mm, or 18mm*(105~120)mm. Preferably, it is 16mm*112mm.

[0079] Optionally, the cross-sectional dimensions of the main channel 202 can be (12-18)mm*105mm, (12-18)mm*106mm, (12-18)mm*107mm, (12-18)mm*108mm, (12-18)mm*109mm, (12-18)mm*110mm, (12-18)mm*115mm, or (12-18)mm*120mm.

[0080] Optionally, the cross-sectional dimensions of the branch sub-channel 210 can be 4mm*(6~13)mm, 5mm*(6~13)mm, 6mm*(6~13)mm, 7mm*(6~13)mm, 8mm*(6~13)mm; (4~8)mm*6mm, (4~8)mm*7mm, (4~8)mm*8mm, (4~8)mm*9mm, (4~8)mm*10mm, (4~8)mm*11mm, (4~8)mm*12mm, (4~8)mm*13mm. Preferably, it is 6mm*8.5mm.

[0081] For some implementation methods, please refer to Figure 7 The surface where the inlet of the main channel 202 is located has a first inner wall angle β with the inner wall surface of the main channel 202, and the first inner wall angle β is 90° to 100°. Specifically, the main board 201 includes a third surface 205 and a fourth surface 206 opposite to each other along a first direction 001, wherein the inlet of the main channel 202 is located on the third surface 205, and the inlet of the main channel 202 extends from the third surface 205 along the first direction 001 to form the main channel 202. The connection between the inner wall of the third surface 205 and the main channel 202 has a first inner wall angle β.

[0082] In a specific embodiment, the third surface 205 can be an annular inclined surface, with the inlet of the main channel 202 located in the middle of the third surface 205. The third surface 205 is inclined inward toward the main channel 202, so that the area at the inlet of the main channel 202 is larger than the internal cross-section of the main channel 202. It is understood that the annular inclined surface of the third surface 205 creates a "funnel" shape at the inlet of the main channel 202, which is more conducive to the inflow of insulating coolant. Optionally, the first inner wall angle β can be 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, or 100°.

[0083] In some embodiments, the surface where the inlet of the branch flow channel 209 is located has a second inner wall angle (not shown in the figure) with the inner wall surface of the branch flow channel 209. The second inner wall angle is greater than or equal to, and can be selected from 90° to 100°. Specifically, the second inner wall angle also makes the inlet of the branch flow channel 209 form a "funnel" shape, which is more conducive to the inflow of insulating coolant, so it will not be described in detail here. Optionally, the second inner wall angle can be 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, or 100°.

[0084] This invention sets the inlet of the main flow channel 202 to have a first inner wall angle and the inlet of the branch flow channel 209 to have a second inner wall angle, so that the main flow channel 202 and the branch flow channel 209 form a funnel shape at the inlet. The inlet has both a guiding effect and can stabilize the flow rate of the insulating coolant, avoiding the formation of turbulence at the inlet of the main flow channel 202 and the branch flow channel 209.

[0085] In some embodiments, the heat insulation component 200 includes a first material having a thermal conductivity of 0.6 W / (mK) to 1.2 W / (mK), a breakdown voltage greater than 18 KV / mm, and a melting point greater than or equal to 300°C. Specifically, any material meeting the above parameter range can be used as the first material. The first material may specifically include ceramic fiber composite materials.

[0086] In specific embodiments, the thermal conductivity of the first material can be 0.6 W / (mK), 0.7 W / (mK), 0.8 W / (mK), 0.9 W / (mK), 1 W / (mK), 1.1 W / (mK), or 1.2 W / (mK). The breakdown voltage of the first material can be from 18 kV / mm to 30 kV / mm, specifically 19 kV / mm, 20 kV / mm, 22 kV / mm, 24 kV / mm, 26 kV / mm, 28 kV / mm, or 30 kV / mm. The melting point of the first material can be from 300°C to 600°C, specifically 350°C, 400°C, 450°C, 500°C, 550°C, or 600°C.

[0087] In some embodiments, the thermal insulation component 200 includes a second material with a thermal conductivity of 0.05 W / (mK) to 0.15 W / (mK). Any material that meets the above parameter range can be used as the second material. Specifically, the second material may include polyimide nanofoam.

[0088] In specific embodiments, the thermal conductivity of the second material can be 0.05 W / (mK), 0.06 W / (mK), 0.07 W / (mK), 0.08 W / (mK), 0.09 W / (mK), 0.1 W / (mK), 0.11 W / (mK), 0.12 W / (mK), 0.13 W / (mK), 0.14 W / (mK), or 0.15 W / (mK).

[0089] In specific embodiments, it should be noted that the heat insulation component 200 may include only the first material or the second material, or it may include both the first material and the second material. Furthermore, the composition of the first and second materials is not limited. For example, the first and second materials may be mixed together to form a homogeneous mixture, which is then used to manufacture the heat insulation component 200. Alternatively, the first material may be used to form the core of the heat insulation component 200, and the second material may be wrapped around it to form a shell, with both materials together forming the heat insulation component 200.

[0090] This utility model provides a heat insulation component 200 made of the aforementioned material, and the aforementioned material meets the performance requirements provided by this utility model, so that the heat insulation component 200 has high temperature resistance, thermal conductivity, and can prevent voltage breakdown; when the battery 20 has a problem, the heat insulation component 200 can isolate the battery 20 from the effects of combustion and resist the damage of high voltage, thereby improving the safety of the submersible battery box 10.

[0091] For some implementation methods, please refer to Figure 6 The heat insulation component 200 includes a first coating 218, which is located on the inner wall of the main flow channel 202 and / or the branch flow channel 209. The contact angle of the first coating 218 is greater than or equal to 160°. Specifically, the inner wall of the main flow channel 202 and the branch flow channel 209 is coated with the first coating 218, which is hydrophobic. Optionally, the contact angle of the first coating 218 can be 165°, 170°, 175°, or 180°. This invention, by coating the inner wall of the main flow channel 202 and the branch flow channel 209 with the first coating 218, makes the flow channel hydrophobic, allowing the insulating coolant to flow faster in the flow channel. The contact angle refers to the angle between the solid-liquid interface, through the liquid interior, and the gas-liquid interface, also known as the wetting angle. The smaller the contact angle, the stronger the spreading ability of the liquid on the solid surface and the better the wettability; conversely, the larger the contact angle, the better the hydrophobicity.

[0092] For some implementation methods, please refer to Figure 6The heat insulation component 200 includes a second coating 219, which is located on the outer surface of the main board 201 and / or the sub-board 208. The thermal conductivity of the second coating 219 is greater than or equal to 40 W / (mK). Specifically, the outer surfaces of the main board 201 and the sub-board 208 are coated with the second coating 219, which has a high thermal conductivity. Optionally, the thermal conductivity of the second coating 219 can be 45 W / (mK), 50 W / (mK), 55 W / (mK), 60 W / (mK), 65 W / (mK), 70 W / (mK), 75 W / (mK), or 80 W / (mK).

[0093] For some implementation methods, please refer to Figure 8 and Figure 9 The submersible battery box 10 also includes a baffle 300, which surrounds and connects to the heat insulation member 200. The baffle 300 has a liquid guiding hole 301, which connects to the inlet of the branch channel 209 and the receiving space 102. Specifically, the baffle 300 has a plate-like structure, and its shape is matched to the shape of the heat insulation member 200.

[0094] In a specific embodiment, the enclosure member 300 is arranged around the outer periphery of the heat insulation member 200 and connected to the heat insulation member 200. The enclosure member 300 includes two large-surface connecting sections 302 and a bent section 303. The two large-surface connecting sections 302 are arranged opposite to each other along a first direction 001, and the bent section 303 extends in a bent manner along the first direction 001. The two ends of the bent section 303 that are opposite to each other along the first direction 001 are respectively connected to the two large-surface connecting sections 302. The two large-surface connecting sections 302 are used to connect the large surfaces of the two sub-plates 208, and the bent section 303 is used to connect the side where the inlet of the branch channel 209 is located and the other sub-plate 208.

[0095] In a specific embodiment, the bending section 303 includes multiple perforated plates 303A and mating plates 303B connected periodically. The perforated plates 303A and mating plates 303B are connected at an angle, preferably 90°. Liquid guide holes 301 are formed on the perforated plates 303A. The perforated plates 303A connect to the side of the sub-plate 208 where the inlet of the branch flow channel 209 is located, and the mating plates 303B connect to another adjacent sub-plate 208. The perforated plates 303A and the partition plates 217 are spaced apart.

[0096] In a specific embodiment, two adjacent sub-boards 208 located on the same side of the main board 201 are arranged in parallel with a space between them. The end of the sub-board 208 away from the main board 201 is the opening of the placement space 214. The perforated plate 303A is disposed at the opening of the placement space 214 and connects the two adjacent sub-boards 208. Thus, the first space 215 in the placement space 214 is formed by the sub-boards 208, the partition plate 217, and the enclosure member 300. The first space 215 is a cubic space adapted to the shape of the battery 20.

[0097] In a specific embodiment, the perforated plate 303A and the mating plate 303B are connected at an angle. Each of the opposite ends of the mating plate 303B is connected to a perforated plate 303A, and all three are connected at an angle, preferably 90°. It can be understood that the function of the bent section 303 is to adapt to the "fishbone" structure of the sub-plates 208 and to enclose the placement space 214; therefore, the bent section 303 extends in a bent manner.

[0098] In a specific embodiment, the plurality of sub-plates 208 includes a head sub-plate 208 and a tail sub-plate 208, which are the two outermost sub-plates 208 in the first direction 001. Each sub-plate 208 includes two large surfaces facing away from each other; a large surface refers to the surface with the largest area on the sub-plate 208. One large surface connecting segment 302 connects the large surface of the head sub-plate 208 facing away from the tail sub-plate 208, and the other large surface connecting segment 302 connects the large surface of the tail sub-plate 208 facing away from the head sub-plate 208. The large surface connecting segment 302 connects to the aforementioned central hole plate 303A.

[0099] This utility model adds a baffle 300 to the immersion battery box 10. On the one hand, it can close the placement space 214, so that each battery 20 in the immersion battery box 10 is set independently and the batteries 20 are isolated from each other, thereby improving the heat insulation effect. On the other hand, the baffle is also to adapt to the shape of the heat insulation component 200, and the overall structure of the immersion battery box 10 is stabilized by fixing the heat insulation component 200.

[0100] For some implementation methods, please refer to Figure 8 and Figure 9 The orifice plate 303A has multiple liquid guiding holes 301, which are sequentially arranged along a third direction 003. It can be understood that the liquid guiding holes 301 are used to cooperate with the liquid inlet of the branch flow channel 209. Therefore, when the branch flow channel 209 includes multiple branch sub-flow channels 210, the number of liquid guiding holes 301 is also multiple. The multiple liquid guiding holes 301 and the multiple branch sub-flow channels 210 are connected in a one-to-one correspondence. Therefore, when there are multiple orifice plates 303A, each orifice plate 303A is provided with multiple liquid guiding holes 301.

[0101] In some embodiments, the surface where the liquid guide hole 301 is located has a third inner wall angle (not shown in the figure) with the inner wall surface of the liquid guide hole 301, and the third inner wall angle is 90° to 100°. Specifically, the surface of the orifice plate 303A facing away from the partition plate 217 has a third inner wall angle with the inner wall surface of the liquid guide hole 301. That is, the surface at the liquid guide hole 301 can be an annular bevel, so that the liquid guide hole 301 forms a "funnel mouth" shape, which is more conducive to the inflow of insulating coolant. Optionally, the third inner wall angle can be 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, or 100°.

[0102] This invention provides a third inner wall angle at the liquid guiding hole 301, which makes the liquid guiding hole 301 also form a funnel shape. The liquid guiding hole 301 and the inlet of the branch flow channel 209 cooperate to improve the flow guiding and stabilizing effect.

[0103] For some implementation methods, please refer to Figure 8 and Figure 9 The housing 100 includes a first wall panel 103 and a second wall panel 104 arranged opposite each other along a first direction 001. The first wall panel 103 has an inlet hole 105. The inlet of the main channel 202 faces the first wall panel 103, and the outlet of the main channel 202 faces the second wall panel 104. The enclosure 300 has a first gap 306 and a second gap 307 arranged opposite each other along the first direction 001. The first gap 306 is located between the inlet of the main channel 202 and the first wall panel 103, and the second gap 307 is located between the outlet of the main channel 202 and the second wall panel 104.

[0104] In a specific embodiment, the first wall panel 103 and the second wall panel 104 are the side panels mentioned above. The first wall panel 103 has a liquid inlet hole 105, and a liquid inlet pipe 105S is provided at the liquid inlet hole 105. The insulating coolant is introduced into the receiving space 102 through the liquid inlet pipe 105S and the liquid inlet hole 105. The heat insulation component 200 may include a head and a tail, wherein the head includes the fourth surface 206 mentioned above, and the tail includes the third surface 205 mentioned above. The fourth surface 206 is the outlet of the main channel 202, and the third surface 205 is the inlet of the main channel 202. The heat insulation component 200 has a "fishbone" shaped structure; the head of the heat insulation component 200 may be convex, and the tail of the heat insulation component 200 may be concave. The fourth surface 206 faces the second wall panel 104, and the third surface 205 faces the first wall panel 103.

[0105] In a specific embodiment, the enclosure 300 includes a first enclosure 304 and a second enclosure 305, which are arranged at a distance from each other along the second direction 002. The first enclosure 304 and the second enclosure 305 have a first gap 306 at the tail of the heat insulation member 200 and a second gap 307 at the head of the heat insulation member 200.

[0106] In a specific embodiment, the first enclosure member 304 and the second enclosure member 305 are axially symmetrical, and are symmetrical about the main board 201. The first enclosure member 304 is used to enclose the placement space 214 formed by multiple first sub-boards 211, and the second enclosure member 305 is used to enclose the placement space 214 formed by multiple second sub-boards 212. It can be understood that since the first sub-boards 211 and second sub-boards 212 are axially symmetrically arranged, the first enclosure member 304 and the second enclosure member 305 are also axially symmetrically arranged to cooperate with the first sub-boards 211 and second sub-boards 212.

[0107] In a specific embodiment, the first enclosure member 304 includes the two large-surface connecting sections 302 and the bending section 303 described above, and the second enclosure member 305 also includes the two large-surface connecting sections 302 and the bending section 303 described above. The liquid guiding hole 301 on the bending section 303 of the first enclosure member 304 is used to connect to the branch flow channel 209 of the first sub-plate 211, and the liquid guiding hole 301 on the bending section 303 of the second enclosure member 305 is used to connect to the branch flow channel 209 of the second sub-plate 212. The large-surface connecting section 302 of the first enclosure member 304 connects to the large surface of the first sub-plate 211, and the large-surface connecting section 302 of the second enclosure member 305 connects to the large surface of the second sub-plate 212.

[0108] In a specific embodiment, the gap between the large-area connecting section 302 of the first baffle 304 at its tail and the large-area connecting section 302 of the second baffle 305 at its tail is a first gap 306, and the gap between the large-area connecting section 302 of the first baffle 304 at its head and the large-area connecting section 302 of the second baffle 305 at its head is a second gap 307. The first gap 306 is used to accommodate the inlet liquid intake of the main channel 202, and the second gap 307 is used to accommodate the outlet liquid output of the main channel 202.

[0109] This utility model also provides an energy storage device 1, please refer to... Figure 1 and Figure 2 The energy storage device 1 includes a battery 20 and an immersion battery case 10 as described in the above embodiment, wherein the battery 20 is housed in the immersion battery case 10. The immersion battery case 10 is filled with an insulating coolant, which may be a 3M fluorinated liquid.

[0110] This utility model also provides an energy storage system, including electrical equipment and an energy storage device 1 as described in the above embodiments.

[0111] In the description of the embodiments of this utility model, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0112] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the present utility model.

Claims

1. A heat insulation component (200), characterized in that, The heat insulation component (200) is applied to an immersion battery box (10), which is filled with insulating coolant. The heat insulation component (200) includes: The motherboard (201) has a main channel (202) that connects to the external space; A sub-board (208) is connected to the main board (201). The sub-board (208) has a branch flow channel (209) that is connected to the main flow channel (202). There are multiple sub-boards (208). There is a placement space (214) between two sub-boards (208) located on the same side of the main board (201). The placement space (214) is used to place the battery (20).

2. The heat insulation component (200) according to claim 1, characterized in that, The main board (201) includes a first side (203) and a second side (204) facing away from each other. The multiple sub-boards (208) include a first sub-board (211) and a second sub-board (212). The first sub-board (211) is connected to the first side (203), and the second sub-board (212) is connected to the second side (204). The first sub-board (211) and the second sub-board (212) have a non-zero included angle α.

3. The heat insulation component (200) according to claim 1 or 2, characterized in that, The heat insulation component (200) also includes a partition plate (217), which connects the main board (201) and the sub-board (208). The partition plate (217) divides the placement space (214) into a first space (215) and a second space (216). The first space (215) is used to place the battery (20), and the second space (216) is used to contain the insulating coolant.

4. The heat insulation component (200) according to claim 1 or 2, characterized in that, The branch channel (209) includes multiple branch sub-channels (210), which are arranged in parallel and are all connected to the main channel (202).

5. The heat insulation component (200) according to claim 1 or 2, characterized in that, Along the direction perpendicular to the main flow channel (202), the main board (201) has a first cross section (207), and the area ratio of the opening area of ​​the main flow channel (202) to the area of ​​the first cross section (207) is M; along the direction perpendicular to the branch flow channel (209), the secondary board (208) has a second cross section (213), and the area ratio of the branch flow channel (209) to the area of ​​the second cross section (213) is N, wherein M:N = 1:(0.5~0.7).

6. The heat insulation component (200) according to claim 1 or 2, characterized in that, The surface where the inlet of the main channel (202) is located has a first inner wall angle with the inner wall surface of the main channel (202), the first inner wall angle being greater than or equal to 90°; and / or, the surface where the inlet of the branch channel (209) is located has a second inner wall angle with the inner wall surface of the branch channel (209), the second inner wall angle being greater than or equal to 90°.

7. The heat insulation component (200) according to claim 1 or 2, characterized in that, The thermal insulation component (200) includes a first coating (218) located on the inner wall of the main flow channel (202) and / or the branch flow channel (209), the first coating (218) being used to improve the hydrophobicity of the inner wall of the thermal insulation component.

8. The heat insulation component (200) according to claim 7, characterized in that, The heat insulation component (200) includes a second coating (219) located on the outer surface of the main plate (201) and / or the sub-plate (208), the second coating (219) being used to improve the thermal conductivity of the outer surface of the heat insulation component.

9. An immersion battery box (10), characterized in that, Includes a housing (100) and a heat insulation element (200) as described in any one of claims 1-8, the housing (100) enclosing a receiving space (102), the heat insulation element (200) being received in the receiving space (102), and the main flow channel (202) and the branch flow channel (209) both communicating with the receiving space (102).

10. The immersion battery box (10) according to claim 9, characterized in that, The submersible battery box (10) also includes a baffle (300) which is arranged around the outer periphery of the heat insulation member (200) and connected to the heat insulation member (200). The baffle (300) has a liquid guiding hole (301) which connects the inlet of the branch channel (209) and the receiving space (102).

11. The immersion battery box (10) according to claim 10, characterized in that, The surface where the liquid guiding hole (301) is located has a third inner wall angle with the inner wall surface of the liquid guiding hole (301), and the third inner wall angle is greater than or equal to 90°.

12. The immersion battery box (10) according to claim 10 or 11, characterized in that, The enclosure component (300) includes two large-face connecting sections (302) and a bending section (303). The two large-face connecting sections (302) are arranged opposite to each other along a first direction (001). The bending section (303) extends in a bent manner along the first direction (001), and the two large-face connecting sections (302) are respectively connected to the two ends of the bending section (303) that are opposite to each other along the first direction (001).

13. The immersion battery box (10) according to claim 12, characterized in that, The bent section (303) includes an orifice plate (303A) and a mating plate (303B), which are connected at an angle. The orifice plate (303A) has a liquid guiding hole (301) and is connected to the side where the inlet of the branch channel (209) is located. The mating plate (303B) is connected to the large surface of the sub-plate (208).

14. The immersion battery box (10) according to claim 10 or 11, characterized in that, The housing (100) includes a first wall panel (103) and a second wall panel (104) arranged opposite each other along a first direction (001). The first wall panel (103) has a liquid inlet hole (105). The inlet of the main channel (202) faces the first wall panel (103), and the outlet of the main channel (202) faces the second wall panel (104). The enclosure component (300) has a first gap (306) and a second gap (307) opposite to each other along the first direction (001). The first gap (306) is located between the inlet of the main channel (202) and the first wall panel (103), and the second gap (307) is located between the outlet of the main channel (202) and the second wall panel (104).

15. The immersion battery box (10) according to claim 14, characterized in that, The enclosure component (300) includes a first enclosure component (304) and a second enclosure component (305). The first enclosure component (304) and the second enclosure component (305) are arranged at a distance from each other along a second direction (002). The gap between the first enclosure component (304) and the second enclosure component (305) near the first wall panel (103) is the first gap (306), and the gap between the first enclosure component (304) and the second enclosure component (305) near the second wall panel (104) is the second gap (307).

16. An energy storage device, characterized in that, Includes a battery (20) and an immersion battery case (10) as described in any one of claims 9-15, wherein the battery (20) is housed in the immersion battery case (10).

Images