An immersion liquid-cooled battery box

Abstract

The application relates to the technical field of batteries, in particular to an immersed liquid-cooled battery box, which comprises a box body configured to be internally hollow and provided with a liquid inlet and a liquid outlet on the side; battery modules arranged in the box body along a first direction; gaps formed between two adjacent battery modules and between the battery modules and the inner wall of the box body and used for fluid flow; a blocking member arranged at the two ends of the box body along a second direction and configured to be opposite to the gaps to block the gaps; a liquid inlet flow channel and a liquid return flow channel formed at one of the two ends of the battery modules along a third direction; and a flow guide member arranged at the other of the two ends of the battery modules along the third direction; the liquid inlet flow channel and the liquid return flow channel are alternately distributed along the first direction and are one-to-one correspondingly arranged in each gap; fluid can flush the side surface and the end surface of a single battery cell, so that the effective heat exchange area and the heat exchange efficiency of the single battery cell are effectively improved, and the heat exchange demand of the battery module can be met.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically to an immersion liquid-cooled battery box. Background Technology

[0002] Battery boxes need to be maintained within a reasonable temperature range during use. Excessive heat or cold can affect the operating efficiency and lifespan of the internal battery cells. Overheating can cause cells to catch fire or explode, threatening the safety of energy storage power stations. Liquid cooling systems are gradually replacing air cooling technology due to their high heat dissipation efficiency, small temperature differences between battery clusters, and significant improvements in battery lifespan and overall lifecycle economics. Immersion liquid cooling, with its unique design and high cooling efficiency, enables effective thermal management of batteries and is gaining increasing acceptance among users.

[0003] During battery operation, the coolant in an immersion liquid-cooled battery box typically flows in through the inlet of the battery box and circulates within the battery box under the drive of external equipment, carrying away heat and flowing out. In existing immersion boxes, the coolant typically flows from the bottom to the top or from the top to the bottom of the battery box and then flows out from the outlet. The coolant generally only contacts the side of the battery cell for heat exchange before being discharged. Therefore, the effective heat exchange area of ​​a single battery cell is small, and the actual heat exchange efficiency of the battery cell is low, making it difficult to meet the heat exchange requirements of the battery module. Utility Model Content

[0004] The purpose of this invention is to provide an immersion liquid-cooled battery box, which aims to solve the problem that the effective heat exchange area of ​​a single cell inside the existing battery box is small, the actual heat exchange efficiency is low, and it is difficult to meet the heat exchange requirements of the battery module.

[0005] To achieve one of the aforementioned objectives, according to one aspect of this application, an immersion liquid-cooled battery box is provided, comprising:

[0006] The housing is configured to be hollow internally and has an inlet and an outlet on the side.

[0007] Battery modules are arranged at intervals inside the housing along a first direction, and gaps for fluid flow are formed between adjacent battery modules and between the battery modules and the inner wall of the housing.

[0008] A sealing element, disposed at both ends of the housing along the second direction, is configured to be opposite the gap to seal it;

[0009] The liquid inlet channel and the liquid return channel are formed at one of the two ends of the battery module along a third direction. The liquid inlet channel and the liquid return channel are configured to be alternately distributed along the first direction and are housed in each of the gaps in a one-to-one correspondence. The liquid inlet channel is connected to the liquid inlet and the corresponding gap, and the liquid return channel is connected to the liquid outlet and the corresponding gap.

[0010] A flow guide, disposed at one of the two ends of the battery module along a third direction, is configured to be one-to-one with the gap at the inlet flow channel and to guide the internal fluid to the gap at the adjacent return flow channel; the gap at the inlet flow channel, the flow guide, the end face of the battery module with the flow guide, and the gap at the return flow channel form a fluid path surrounding the battery module.

[0011] In addition to one or more of the above, or as an alternative, in another embodiment, the liquid inlet channel is provided on both inner walls of the box along the first direction, and multiple sets of the liquid inlet channel and the liquid return channel are alternately arranged along the first direction.

[0012] In addition to one or more of the above, or as an alternative, in another embodiment, the inlet channel is provided with a plurality of liquid outlets communicating with the gap along the second direction, and the return channel is provided with a plurality of return ports communicating with the gap along the second direction.

[0013] In addition to one or more of the above, or as an alternative, in another embodiment, the spacing between two adjacent liquid outlets along the second direction gradually increases, and the cross-sectional area of ​​each liquid outlet increases sequentially.

[0014] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0015] The return liquid plate is attached to the inner wall of the box and forms multiple return liquid channels therewith;

[0016] The liquid inlet plate is installed on the side of the liquid return plate away from the inner wall of the box, and multiple liquid inlet channels are formed between the liquid inlet plate and the liquid return plate. The liquid return plate and the liquid inlet plate are stacked sequentially at one end of the box along a third direction.

[0017] In addition to one or more of the above, or as an alternative, in another embodiment, the return plate includes:

[0018] A return guide plate is configured to communicate with the liquid outlet;

[0019] The support and the return liquid rack are alternately arranged along the first direction on the side of the return liquid guide plate away from the return liquid port; the return liquid rack is attached to the inner wall of the box and forms the return liquid flow channel with it; the return liquid rack is connected to the return liquid guide plate and has multiple return liquid ports along the second direction.

[0020] In addition to one or more of the above, or as an alternative, in another embodiment, the return fluid guide plate includes:

[0021] The return liquid housing is configured to be hollow inside and has a return liquid outlet on the side near the liquid outlet. The return liquid housing has multiple return liquid inlets on the side opposite to the return liquid outlet, which correspond one-to-one with the return liquid guide plate.

[0022] The flow guide is installed at an angle on the top of the return liquid housing near the outlet, and is configured to guide the fluid at the return liquid inlet to the outlet.

[0023] In addition to one or more of the above, or as an alternative, in another embodiment, the bracket and the return liquid rack are further equipped with a tail support at the end opposite to the return liquid guide plate.

[0024] In addition to one or more of the above, or as an alternative, in another embodiment, the liquid inlet plate body includes:

[0025] The liquid inlet guide plate is configured to communicate with the liquid inlet;

[0026] The liquid inlet rack is equally spaced along the first direction on the side of the liquid inlet guide plate away from the liquid inlet. It is configured to be attached to the side of the bracket away from the inner wall of the box and form the liquid inlet channel with it. The liquid inlet rack is connected to the liquid inlet guide plate and has a plurality of liquid outlets sequentially opened along the second direction.

[0027] In addition to one or more of the above, or as an alternative, in another embodiment, the liquid inlet guide includes:

[0028] The liquid inlet housing is configured to be hollow inside and has a liquid inlet on the side near the liquid inlet. The side of the liquid inlet housing opposite to the liquid inlet has a plurality of liquid outlets corresponding to the liquid inlet frame.

[0029] An inclined plate, installed at an angle on the top of the return housing near the inlet, is configured to guide the fluid at the inlet to the inlet.

[0030] In addition to one or more of the above, or as an alternative, in another embodiment, the liquid inlet is provided in multiple ways along the first direction, and the liquid outlet is provided at equal intervals along the first direction and is more numerous than the liquid inlet.

[0031] In addition to one or more of the above, or as an alternative, in another embodiment, the sealing element is installed between two corresponding ends of two adjacent battery modules along the second direction, and between the two ends of the outermost battery module along the second direction and the inner wall of the housing.

[0032] In addition to one or more of the above, or as an alternative, in another embodiment, the sealing element is configured as a sealing block and is bolted to the ends of two adjacent battery modules and between the outermost battery module and the inner wall of the housing.

[0033] In addition to one or more of the above, or as an alternative, in another embodiment, the flow guide is configured as a flow guide plate, the flow guide plate located between two adjacent battery modules is configured as a T-shaped plate, and the flow guide plate located between the battery module and the inner wall of the housing is configured as a bent plate.

[0034] In addition to one or more of the above, or as an alternative, in another embodiment, the guide plate is provided with a plurality of guide holes at equal intervals along the second direction, which are connected to the gap at the liquid inlet channel and the end face of the battery module where the guide member is located.

[0035] In addition to one or more of the above, or as an alternative, in another embodiment, the guide hole of the T-shaped plate extends from one end near the gap at the inlet channel to both sides of its top end face; the guide hole of the bent plate extends from one end near the gap at the inlet channel to the side of its top end face facing away from the inner wall of the box.

[0036] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0037] A lid is provided on the side of the box body near the flow guide, and / or,

[0038] An explosion-proof vent valve is installed on the cover of the enclosure and communicates with the internal space of the enclosure; and / or,

[0039] Reinforcing ribs are installed on the side of the housing; and / or,

[0040] The level gauge and pressure testing connector are fixed to the side of the housing that has the inlet and outlet.

[0041] Compared with the prior art, the beneficial effects of this utility model are as follows: By forming gaps between adjacent battery modules and between the battery module and the inner wall of the casing, space for fluid flow is provided. By sealing both ends of the gaps with sealing components, an effective fluid flow path is formed. By setting the inlet and outlet channels alternately and correspondingly accommodating them in each gap, inlet gaps and outlet gaps can be formed sequentially in the gaps between the battery modules. With the help of guide components, the fluid in the gap at the inlet channel is guided to the gap at the outlet channel. The fluid returns to the outlet through the inlet port, the gap at the inlet channel, the guide components, the end face of the battery module, and the gap at the outlet channel, thus forming a fluid path around the battery module. Compared with conventional battery box coolant, which can only flush the side of a single cell, this solution can flush the side and end face of a single cell, thereby effectively improving the effective heat exchange area and actual heat exchange efficiency of a single cell, which can meet the heat exchange requirements of the battery module. Attached Figure Description

[0042] The disclosure of this application will be more readily understood with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0043] In the picture:

[0044] Figure 1 This is a perspective view of an immersion liquid-cooled battery box according to this application;

[0045] Figure 2 A three-dimensional structural diagram of an immersion liquid-cooled battery box with the external casing removed, provided in this application;

[0046] Figure 3 for Figure 1 Sectional view of AA;

[0047] Figure 4 A cross-sectional view of an immersion liquid-cooled battery box along another direction provided in this application;

[0048] Figure 5 for Figure 1 BB section view;

[0049] Figure 6 for Figure 3 Enlarged view of a portion of point A in the middle;

[0050] Figure 7 for Figure 3 Enlarged view of a section at point B in the middle;

[0051] Figure 8 This is a three-dimensional structural diagram of the connection between the liquid inlet plate and the liquid return plate of an immersion liquid-cooled battery box according to this application.

[0052] Figure 9 This is a three-dimensional structural diagram of the return plate of an immersion liquid-cooled battery box according to this application;

[0053] Figure 10 This is a three-dimensional structural schematic diagram of a liquid return guide plate for an immersion liquid-cooled battery box according to this application;

[0054] Figure 11 This is a three-dimensional structural schematic diagram of the return guide plate of an immersion liquid-cooled battery box according to this application from another perspective.

[0055] Figure 12 This is a three-dimensional structural diagram of the liquid inlet plate of an immersion liquid-cooled battery box according to this application;

[0056] Figure 13 This is a three-dimensional structural schematic diagram of the liquid inlet guide plate of an immersion liquid-cooled battery box according to this application;

[0057] Figure 14 This is a three-dimensional structural schematic diagram of the liquid inlet guide plate of an immersion liquid-cooled battery box according to this application from another perspective.

[0058] Figure 15 This is a three-dimensional structural diagram of a bent plate of an immersion liquid-cooled battery box according to this application;

[0059] Figure 16 This is a three-dimensional structural schematic diagram of a bent plate of an immersion liquid-cooled battery box according to this application from another perspective.

[0060] Figure 17 This is a three-dimensional structural diagram of a T-shaped plate of an immersion liquid-cooled battery box according to this application;

[0061] Figure 18 This is a three-dimensional structural schematic diagram of a T-shaped plate of an immersion liquid-cooled battery box according to this application from another perspective.

[0062] In the attached diagram: 1-box body, 11-liquid inlet, 12-liquid outlet, 13-box cover, 14-explosion-proof vent valve, 15-reinforcing rib, 16-liquid level gauge, 17-pressure test connector, 2-battery module, 3-sealing component, 4-liquid inlet channel, 5-liquid return channel, 6-guide component, 61-T-shaped plate, 62-bent plate, 63-guide hole, 7-liquid return plate body, 71-liquid return guide plate, 711-liquid return shell, 712-liquid return outlet, 713-liquid return inlet, 714-guide section, 72-bracket, 73-liquid return rack, 74-liquid return port, 75-tail support component, 8-liquid inlet plate body, 81-liquid inlet guide plate, 811-liquid inlet shell, 812-liquid inlet, 813-liquid inlet outlet, 814-sloping plate, 82-liquid inlet rack, 83-liquid guide outlet. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0064] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0065] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0066] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0067] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0068] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0069] In existing submerged liquid-cooled battery cases, the coolant typically enters the case from one end of the inlet and eventually flows out from the inlet after circulation. The coolant flow path is longer for cells farther from the inlet compared to cells closer to the inlet, which can easily lead to overheating of cells at the far end, thus severely affecting the cooling efficiency of cells at the end. Therefore, this application proposes a submerged liquid-cooled battery case.

[0070] Figure 1 This is a perspective view of an immersion liquid-cooled battery box according to one embodiment of the present application, and includes: a box body 1 configured to be hollow internally and having a liquid inlet 11 and a liquid outlet 12 provided on the side; battery modules 2 spaced apart inside the box body 1 along a first direction, forming gaps between two adjacent battery modules 2 and between the battery modules 2 and the inner wall of the box body 1 for fluid flow; sealing members 3 disposed at both ends of the box body 1 along a second direction and configured to block the gaps; a liquid inlet channel 4 and a liquid return channel 5 formed at one of the two ends of the battery modules 2 along a third direction; and a liquid outlet 12 disposed on the battery modules 1. The flow guide 6 at one end of the third direction of group 2, the liquid inlet channel 4 and the liquid return channel 5 are configured to be alternately distributed along the first direction and housed in each gap. The liquid inlet channel 4 is connected to the liquid inlet 11 and the corresponding gap, and the liquid return channel 5 is connected to the liquid outlet 12 and the corresponding gap. The flow guide 6 is configured to be opposite to the gap at the liquid inlet channel 4 and to guide the fluid inside it to the gap at the adjacent liquid return channel 5. The gap at the liquid inlet channel 4, the flow guide 6, the end face of the battery module 2 with the flow guide 6, and the gap at the liquid return channel 5 form a fluid path around the battery module 2.

[0071] Under this arrangement, refer to Figures 1-7 This paper describes an immersion liquid-cooled battery box. By creating gaps between adjacent battery modules 2 and between battery modules 2 and the inner wall of the box 1, space is provided for fluid flow. The two ends of the gaps are sealed by sealing components 3, thus forming an effective fluid flow path. By setting the inlet channel 4 and the return channel 5 at intervals and correspondingly accommodating them in each gap, inlet gaps and outlet gaps can be formed sequentially in the gaps between the battery modules 2. With the help of the guide component 6, the fluid in the gap of the inlet channel 4 is guided to the gap of the return channel 5. The fluid returns to the outlet 12 through the inlet port 11, the gap of the inlet channel 4, the guide component 6, the end face of the battery module 2, and the gap of the return channel 5, thus forming a fluid path around the battery module 2. Compared with conventional battery boxes where the coolant can only flush the side of a single cell, this solution can flush the side and end face of a single cell, thereby effectively improving the effective heat exchange area and actual heat exchange efficiency of a single cell, which can meet the heat exchange requirements of the battery module 2.

[0072] It should be noted that, compared with the traditional immersion liquid cooling flushing technology, the above-mentioned flow path with multiple inlet and outlet paths further improves the flow efficiency of the coolant, thereby further improving the heat exchange efficiency of the battery module 2, and has strong practicality.

[0073] In practical applications, this embodiment should be referenced. Figure 3 , Figure 6 and Figure 7 The design of the inlet channel 4 and the return channel 5 allows the coolant to flow along a predetermined path, ensuring that each battery module 2 can be effectively cooled and improving the overall thermal management efficiency.

[0074] It should be noted that the first direction refers to the spacing between battery modules, the second direction refers to the stacking direction of battery cells within the battery module, and the third direction is vertical. The first, second, and third directions are all perpendicular to each other. For a detailed description of their distribution, please refer to [reference needed]. Figure 1 The directions in the diagram are as shown in the other attached diagrams. Figure 1 They are not listed one by one in each diagram.

[0075] In one embodiment, the fluid is generally a battery coolant, such as perfluorocarbons (PFCs) and partially fluorinated hydrocarbons. Due to their excellent dielectric properties, good thermal stability, and non-flammability, they are very suitable for applications in high-voltage environments. Of course, the coolant can also be mineral oil, synthetic oil, silicone oil, etc., which utilize their good thermal stability and chemical inertness to ensure the safety of electronic components. The type of coolant can be selected as needed, and this embodiment does not make specific limitations.

[0076] The following will illustrate further specific implementations or refinements of the immersion liquid-cooled battery box through exemplary description, in order to further improve it or for other improvement considerations.

[0077] Based on this, refer to Figure 3 The box body 1 is provided with liquid inlet channels 4 on both inner walls along the first direction, and multiple sets of liquid inlet channels 4 and liquid return channels 5 are alternately arranged along the first direction.

[0078] It is easy to see that by setting liquid inlet channels 4 and liquid return channels 5 alternately on the inner walls of both sides of the housing 1 along the first direction, a liquid inlet gap is formed between the inner wall of the housing 1 and the battery module 2, and a liquid inlet gap and a liquid outlet gap are formed between two adjacent battery modules 2, so that each row of battery modules 2 forms a flow path around the fluid; and the liquid inlet channel 4 and the liquid outlet channel are not connected, so a complete circulation path can be formed.

[0079] For example, the liquid inlet channel 4 and liquid return channel 5 can be adjusted as needed. For instance, the liquid outlet channel can be set near the inner walls on both sides, and the liquid inlet channel 4 can be set at other locations. As long as the fluid flow path around the battery cell can be formed, surrounding the individual battery cell, thereby increasing the heat exchange area of ​​the battery cell, it is acceptable. The specific distribution of the liquid outlet channel and liquid inlet channel 4 in the gap can be adjusted as needed. This embodiment does not make specific limitations here.

[0080] In a more specific implementation, refer to Figure 3 , Figure 6 and Figure 7 The inlet channel 4 is provided with multiple liquid outlets 83 that communicate with the gap along the second direction, and the return channel 5 is provided with multiple return ports 74 that communicate with the gap along the second direction.

[0081] It is easy to see that by providing liquid outlets 83 at intervals in the liquid inlet channel 4, since the second direction is the stacking direction of the cells of a single battery module 2, a fluid flow path can be formed around the single cell, which accelerates the cooling flow and improves the heat exchange efficiency of the single cell. Similarly, the above-mentioned return port 74 can also accelerate the return of coolant, further improving the cooling efficiency of the cell.

[0082] It should be noted that the above-mentioned liquid outlet 83 and return outlet 74 can work with the flow guide 6 to form a coolant contact surface surrounding at least three sides of the cell, thereby shortening the actual flow path of the coolant around each cell. Unlike the long path of traditional coolant, this embodiment can form a coolant path around the inlet battery module 2, thereby shortening the flow path of traditional battery coolant and solving the problem of excessively high cell temperature caused by excessively long flow path.

[0083] Based on this, refer to Figure 3 , Figure 6 , Figure 7 and Figure 8 The distance between two adjacent liquid outlets 83 along the second direction gradually increases, and the cross-sectional area of ​​each liquid outlet 83 increases sequentially.

[0084] It can be seen that the cross-sectional area of ​​the liquid outlet 83 along the second direction increases sequentially, and the distance between adjacent liquid outlets 83 gradually increases to ensure the flow rate of coolant at the rear end of the battery cell, and to avoid the coolant flow rate slowing down due to insufficient pressure at the rear end, thereby further ensuring the cooling effect of battery cells at different positions at the front and rear.

[0085] For example, the spacing and specific cross-sectional area between the above-mentioned liquid outlets 83 can also be adjusted as needed to achieve the best coolant flow effect. This embodiment does not specifically limit the specific settings and dimensions.

[0086] In one embodiment, reference is made to... Figure 3 , Figure 6 , Figure 7 and Figure 8 It also includes: a return plate 7 that is attached to the inner wall of the box body 1 and forms multiple return flow channels 5 therewith; an inlet plate 8 that is installed on the side of the return plate 7 away from the inner wall of the box body 1 and forms multiple inlet flow channels 4 between the inlet plate 8 and the return plate 7; the return plate 7 and the inlet plate 8 are stacked sequentially at one end of the box body 1 along a third direction.

[0087] It can be seen that by using the return plate 7 and the inlet plate 8, and by attaching them to the inner wall of the housing 1 and stacking them together, the above-mentioned inlet flow channel 4 and return flow channel 5 can be easily formed. The inlet flow channel 4 and the return flow channel 5 are not connected to each other, thereby further optimizing the flow path of the coolant and improving the cooling efficiency of the battery cell.

[0088] In addition, the stacked design of the return plate 7 and the inlet plate 8 facilitates detachable connection with the housing 1 during actual production, thereby enabling modular installation of the entire battery housing 1, making assembly and disassembly easier and improving the convenience of system maintenance.

[0089] For example, the structure of the liquid inlet channel 4 and the liquid return channel 5 can also be in the shape of a pipe, and of course other forms can also be adopted. The focus of this embodiment is to form a fluid flow path around the battery cell. The specific form of the liquid inlet channel 4 and the liquid return channel 5 is not a limiting provision of this embodiment.

[0090] Specifically, refer to Figures 9-11 The return plate 7 includes: a return guide plate 71 configured to communicate with the outlet 12; and a bracket 72 and a return rack 73 alternately arranged on the side of the return guide plate 71 away from the return outlet 74 along a first direction; the return rack 73 is attached to the inner wall of the box 1 and forms a return flow channel 5 therewith, the return rack 73 is connected to the return guide plate 71 and has a plurality of return outlets 74 opened along a second direction.

[0091] It is easy to see that the return guide plate 71 facilitates the flow of coolant to the outlet 12 of the housing 1, while the return rack 73 is fitted to the inner wall of the bottom of the housing 1 to form the aforementioned return flow channel 5. By utilizing its multiple return ports 74 extending in the second direction, effective return of coolant around the battery cell can be achieved, which facilitates the formation of a return path.

[0092] Based on this, the return liquid guide plate 71 includes: a return liquid housing 711 configured to be hollow inside and having a return liquid outlet 712 on one side near the liquid outlet 12; a flow guide 714 inclinedly installed on the top of the return liquid housing 711 near the liquid outlet 12; and a plurality of return liquid inlets 713 corresponding to the return liquid plate on the side of the return liquid housing 711 away from the return liquid outlet 712. The flow guide 714 is configured to guide the fluid at the return liquid inlet 713 to the liquid outlet 12.

[0093] It can be understood that the guide section 714 facilitates the guidance of the returning liquid to the outlet 12, and the inclined guide section 714 can isolate the returning liquid from the inlet 11 below, thereby ensuring that the inlet and outlet are not connected, and further improving the reliable path of coolant flow.

[0094] Furthermore, a tail support 75 is installed at the end of the bracket 72 and the return liquid rack 73 opposite to the return liquid guide plate 71.

[0095] In this arrangement, the tail support 75 can support the ends of the bracket 72 and the return liquid rack 73, thereby ensuring the stable installation of the entire return plate at the bottom of the battery box 1.

[0096] For example, the tail support 75 described above can be a support plate, and its specific shape can be selected as needed. This embodiment does not make specific limitations here.

[0097] Furthermore, refer to Figures 12-14 The liquid inlet plate 8 includes: a liquid inlet guide plate 81 configured to communicate with the liquid inlet 11, and a liquid inlet rack 82 equally spaced along the first direction on the side of the liquid inlet guide plate 81 away from the liquid inlet 11. The liquid inlet rack 82 is configured to be attached to the side of the bracket 72 away from the inner wall of the box 1 and form a liquid inlet channel 4 with it. The liquid inlet rack 82 is connected to the liquid inlet guide plate 81 and has a plurality of liquid outlets 83 sequentially opened along the second direction.

[0098] It can be understood that the main function of the liquid inlet guide plate 81 is to quickly guide the liquid in the liquid inlet 11 to the interior of multiple liquid inlet racks 82. By utilizing the liquid inlet flow channel 4 formed between the liquid inlet rack 82 and the support 72, the fluid is guided to different gap positions. The setting of the liquid outlet 83 ensures that the liquid can flow evenly into different positions along the second direction of the gap, thus ensuring the cooling effect of the battery cells at different positions.

[0099] It is easy to see that the conductive design of the liquid inlet rack 82 and the liquid inlet guide plate 81 enables the coolant to enter each liquid inlet channel 4 efficiently, ensuring that each battery module 2 can be fully cooled.

[0100] In one embodiment, the liquid inlet guide plate 81 includes: a liquid inlet housing 811 configured to be hollow inside and having a liquid inlet 812 on the side near the liquid inlet 11, and an inclined plate 814 installed at an angle on the top of the return housing 711 near the liquid inlet 11. The liquid inlet housing 811 has a plurality of liquid inlet outlets 813 on the side away from the liquid inlet 812, which correspond one-to-one with the liquid inlet frame 82. The inclined plate 814 is configured to guide the fluid at the liquid inlet 11 to the liquid inlet 812.

[0101] It can be understood that the inclined plate 814 can contact the liquid entering through the inlet 11, thereby using the inlet housing 811 to facilitate the introduction of the coolant flowing into the inlet 11 through the inlet inlet 812, and then quickly distributed to each inlet channel 4 through the inlet outlet 813, thereby ensuring the smooth liquid intake of each inlet channel 4 and preventing it from communicating with the outlet channel, thus improving the reliability of the device's diversion.

[0102] Based on this, multiple liquid inlets 812 are provided along the first direction, and liquid outlets 813 are provided at equal intervals along the first direction and are more numerous than the liquid inlets 812.

[0103] Specifically, the design of multiple liquid inlets 812 and a greater number of liquid inlets 813 provides multiple liquid inlet paths, which can effectively solve the problem of uneven liquid flow caused by a single liquid inlet 11 at the liquid inlet position, and further improve the uniformity of coolant flow and cooling efficiency.

[0104] In another embodiment, reference is made to... Figure 2 and Figure 4 The sealing component 3 is installed between the two corresponding ends of two adjacent battery modules 2 along the second direction, and between the two ends of the outermost battery module 2 along the second direction and the inner wall of the housing 1.

[0105] In this arrangement, the installation of the sealing component 3 ensures that the gaps between adjacent battery modules 2 and between the outermost battery module 2 and the inner wall of the housing 1 are effectively sealed, preventing leakage of coolant during the flow process, ensuring smooth flow of the inlet channel 4 and the return channel 5, and forming an effective flow path of fluid around the battery module 2.

[0106] For example, the sealing element 3 is configured as a sealing block and is fixedly installed between the ends of two adjacent battery modules 2 and between the outermost battery module 2 and the inner wall of the housing 1 by bolts. The sealing block is fixedly installed by bolts to ensure the firmness of the sealing element 3 and prevent it from loosening or falling off during use.

[0107] In actual operation, this embodiment should be referred to Figures 2-4 ,as well as Figures 15-18The flow guide 6 is configured as a flow guide plate. The flow guide plate located between two adjacent battery modules 2 is constructed as a T-shaped plate 61, and the flow guide plate located between the battery module 2 and the inner wall of the housing 1 is constructed as a bent plate 62.

[0108] It can be seen that by setting guide vanes of different shapes at different locations, the coolant can be guided according to different locations, thereby optimizing the flow path of the coolant and ensuring that the coolant can flow smoothly from the inlet channel 4 to the return channel 5.

[0109] In one embodiment, the guide plate has multiple guide holes 63 at equal intervals along the second direction, which are connected to the gap at the liquid inlet channel 4 and the end face of the battery module 2 where the guide member 6 is located.

[0110] It is easy to see that by opening multiple guide holes 63 distributed along the second direction inside the guide plate, the coolant can be evenly distributed to each cell position of the battery module 2, ensuring smooth flow of fluid around each cell.

[0111] In another embodiment, reference is made to... Figures 2-4 ,as well as Figures 15-18 The guide hole 63 of the T-shaped plate 61 extends from one end near the gap in the liquid inlet channel 4 to both sides of its top end face; the guide hole 63 of the bent plate 62 extends from one end near the gap in the liquid inlet channel 4 to the side of its top end face facing away from the inner wall of the box 1.

[0112] It can be seen that the guide holes 63 of the T-shaped plate 61 and the bending plate 62 extend from the gap near the liquid inlet channel 4 to its top end face, ensuring that the coolant can flow smoothly from the liquid inlet channel 4 to the liquid return channel 5, thereby improving the fluid guiding efficiency at the top of the battery module 2.

[0113] For example, the T-shaped plate 61 can be set between two adjacent battery modules 2, and the bent plate 62 can be set as a 90-degree bent plate and installed between the battery module 2 and the inner wall of the housing 1. Of course, the above-mentioned guide 6 can also adopt other shapes. It can mainly guide the fluid in the gap of the liquid inlet channel 4 to the upper surface of the battery module 2, and then guide it to the gap of the liquid return channel 5. This embodiment does not make specific limitations here.

[0114] In practical applications, this embodiment should be referenced. Figure 1 It also includes: a cover 13, which is installed on the side of the box body 1 near the guide member 6, and / or an explosion-proof vent valve 14 installed on the cover 13 and communicating with the internal space of the box body 1; and / or reinforcing ribs 15 installed on the side and bottom of the box body 1; and / or a level gauge 16 and a pressure measuring connector 17 fixed on the side of the box body 1 with the liquid inlet 11 and the liquid outlet 12.

[0115] It is easy to see that by setting the cover 13 and the explosion-proof vent valve 14, the safety of the battery box can be improved and safety accidents caused by excessive internal pressure can be prevented. The reinforcing rib 15 can be used to improve the strength of the outer perimeter of the box body 1, while the liquid level gauge 16 and the pressure measuring connector 17 can monitor the liquid level and internal pressure inside the box body 1 in real time, ensuring the stable operation of the box body 1.

[0116] The above examples primarily illustrate an immersion liquid-cooled battery box according to this application. Although only some embodiments of this application have been described, those skilled in the art should understand that this application can be implemented in many other forms without departing from its spirit and scope. Therefore, the examples and embodiments shown are considered illustrative rather than restrictive, and this application may cover various modifications and substitutions without departing from the spirit and scope of the technical solution of this application.

Claims

1. An immersion liquid-cooled battery box, characterized in that, include: The housing is configured to be hollow internally and has an inlet and an outlet on the side. Battery modules are arranged at intervals inside the housing along a first direction, and gaps for fluid flow are formed between adjacent battery modules and between the battery modules and the inner wall of the housing. A sealing element, disposed at both ends of the housing along the second direction, is configured to be opposite the gap to seal it; The liquid inlet channel and the liquid return channel are formed at one of the two ends of the battery module along a third direction. The liquid inlet channel and the liquid return channel are configured to be alternately distributed along the first direction and are housed in each of the gaps in a one-to-one correspondence. The liquid inlet channel is connected to the liquid inlet and the corresponding gap, and the liquid return channel is connected to the liquid outlet and the corresponding gap. A flow guide, disposed at one of the two ends of the battery module along a third direction, is configured to be one-to-one with the gap at the inlet flow channel and to guide the internal fluid to the gap at the adjacent return flow channel; the gap at the inlet flow channel, the flow guide, the end face of the battery module with the flow guide, and the gap at the return flow channel form a fluid path surrounding the battery module.

2. The immersion liquid-cooled battery box according to claim 1, characterized in that, The liquid inlet channel is provided on both inner walls of the box along the first direction, and multiple sets of liquid inlet channels and liquid return channels are alternately arranged along the first direction.

3. The immersion liquid-cooled battery box according to claim 1, characterized in that, The inlet channel is provided with a plurality of liquid outlets communicating with the gap along the second direction, and the return channel is provided with a plurality of return ports communicating with the gap along the second direction.

4. The immersion liquid-cooled battery box according to claim 3, characterized in that, The distance between two adjacent liquid outlets along the second direction gradually increases, and the cross-sectional area of ​​each liquid outlet increases sequentially.

5. A submersible liquid-cooled battery box according to claim 3 or 4, characterized in that, Also includes: The return plate is attached to the inner wall of the box and forms multiple return channels therewith; The liquid inlet plate is installed on the side of the liquid return plate away from the inner wall of the box, and multiple liquid inlet channels are formed between the liquid inlet plate and the liquid return plate. The liquid return plate and the liquid inlet plate are stacked sequentially at one end of the box along a third direction.

6. The immersion liquid-cooled battery box according to claim 5, characterized in that, The return liquid plate includes: A return guide plate is configured to communicate with the liquid outlet; The support and the return liquid rack are alternately arranged along the first direction on the side of the return liquid guide plate away from the return liquid port; the return liquid rack is attached to the inner wall of the box and forms the return liquid flow channel with it; the return liquid rack is connected to the return liquid guide plate and has multiple return liquid ports along the second direction.

7. The immersion liquid-cooled battery box according to claim 6, characterized in that, The return liquid guide plate includes: The return liquid housing is configured to be hollow inside and has a return liquid outlet on the side near the liquid outlet. The return liquid housing has multiple return liquid inlets on the side opposite to the return liquid outlet, which correspond one-to-one with the return liquid guide plate. The flow guide is installed at an angle on the top of the return liquid housing near the outlet, and is configured to guide the fluid at the return liquid inlet to the outlet.

8. The immersion liquid-cooled battery box according to claim 6, characterized in that, The bracket and the return liquid rack are also equipped with a tail support at the end opposite to the return liquid guide plate.

9. The immersion liquid-cooled battery box according to claim 7, characterized in that, The liquid inlet plate includes: The liquid inlet guide plate is configured to communicate with the liquid inlet; The liquid inlet rack is equally spaced along the first direction on the side of the liquid inlet guide plate away from the liquid inlet. It is configured to be attached to the side of the bracket away from the inner wall of the box and form the liquid inlet channel with it. The liquid inlet rack is connected to the liquid inlet guide plate and has a plurality of liquid outlets sequentially opened along the second direction.

10. The immersion liquid-cooled battery box according to claim 9, characterized in that, The liquid inlet guide plate includes: The liquid inlet housing is configured to be hollow inside and has a liquid inlet on the side near the liquid inlet. The side of the liquid inlet housing opposite to the liquid inlet has a plurality of liquid outlets corresponding to the liquid inlet frame. An inclined plate, installed at an angle on the top of the return housing near the inlet, is configured to guide the fluid at the inlet to the inlet.

11. The immersion liquid-cooled battery box according to claim 9, characterized in that, The liquid inlet is provided in multiple ways along the first direction, and the liquid outlet is provided at equal intervals along the first direction and is more numerous than the liquid inlet.

12. The immersion liquid-cooled battery box according to claim 1, characterized in that, The sealing element is installed between the two corresponding ends of two adjacent battery modules along the second direction, and between the two ends of the outermost battery module along the second direction and the inner wall of the box.

13. The immersion liquid-cooled battery box according to claim 12, characterized in that, The sealing element is configured as a sealing block and is fixedly installed between the ends of two adjacent battery modules and between the outermost battery module and the inner wall of the housing by bolts.

14. The immersion liquid-cooled battery box according to claim 1, characterized in that, The flow guide is configured as a flow guide plate. The flow guide plate located between two adjacent battery modules is constructed as a T-shaped plate, and the flow guide plate located between the battery module and the inner wall of the box is constructed as a bent plate.

15. The immersion liquid-cooled battery box according to claim 14, characterized in that, The guide plate has multiple guide holes at equal intervals along the second direction, which are connected to the gap at the liquid inlet channel and the end face of the battery module where the guide component is located.

16. The immersion liquid-cooled battery box according to claim 15, characterized in that, The guide hole of the T-shaped plate extends from one end near the gap in the liquid inlet channel to both sides of its top end face; the guide hole of the bent plate extends from one end near the gap in the liquid inlet channel to the side of its top end face facing away from the inner wall of the box.

17. The immersion liquid-cooled battery box according to claim 1, characterized in that, Also includes: A lid is provided on the side of the box body near the flow guide, and / or, An explosion-proof vent valve is installed on the cover of the enclosure and communicates with the internal space of the enclosure, and / or, Reinforcing ribs are installed on the side of the housing, and / or... The level gauge and pressure testing connector are fixed to the side of the housing that has the inlet and outlet.

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