Battery box and energy storage system

Abstract

The application relates to the technical field of batteries, in particular to a battery box and an energy storage system. The battery box comprises a box body configured to be internally hollow and provided with a liquid inlet and a liquid outlet; a plurality of battery modules installed in the interior of the box body along a first direction; a gap flow channel formed between two adjacent battery modules and between the battery modules and the inner wall of the box body; a first end and a second end close to the liquid inlet of the gap flow channel arranged along a second direction; a third end and a fourth end of the gap flow channel arranged along a third direction; a plugging unit configured to be installed at the second end, the third end and the fourth end of the gap flow channel to plug the three ends. The flow blocking member can form a flow blocking position in the gap flow channel, increase the flow resistance in the interior of the gap flow channel, improve the flow rate of the cooling liquid at the top of the battery, so that the cooling liquid is more uniformly distributed in the entire battery box, the temperature equalization effect of different positions of the battery is improved, better temperature control is realized, and the uniform heat dissipation requirement is met.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery box, and further to an energy storage system including the battery box. Background Technology

[0002] With the increase in battery energy density and discharge power, traditional heat dissipation solutions can no longer meet the current requirements for battery heat dissipation. Immersion liquid cooling is a battery heat dissipation solution that directly immerses the battery in the coolant and uses the circulating coolant to remove the heat generated during battery operation, thereby achieving rapid cooling of the battery cell. Since the battery cell is in direct contact with the coolant and completely isolated from oxygen, it can quickly absorb and disperse the heat generated by the battery, maintain the stability of the battery temperature, thereby improving the battery performance and efficiency, ensuring that the battery operates within the optimal temperature range, effectively extending the battery's lifespan, and improving the overall safety performance of the energy storage power station.

[0003] Immersion liquid-cooled battery solutions typically have an inlet and an outlet on one side of the battery box. Coolant enters the battery box through the inlet and flows out through the outlet, thereby achieving rapid cooling of the internal battery. When the battery box is full of coolant, due to gravity, the coolant at the bottom, which is far from the inlet, flows faster than the coolant at the top. As a result, the actual heat dissipation effect of the battery at the top is weaker than that at the bottom, leading to poor temperature uniformity across different parts of the battery and making it difficult to meet the uniform heat dissipation requirements of different parts of the battery. Utility Model Content

[0004] The purpose of this invention is to provide a battery box and energy storage system, which aims to solve the problem that the coolant flow rate at the top of the battery, which is far from the inlet, is slow, the temperature uniformity at different positions of the battery is poor, and it is difficult to meet the battery's uniform heat dissipation requirements.

[0005] To achieve one of the aforementioned objectives, according to one aspect of this application, a battery box is provided, comprising:

[0006] The housing is configured to be hollow inside and has a liquid inlet and a liquid outlet. Multiple battery modules are installed inside the housing along a first direction.

[0007] A gap flow channel is formed between two adjacent battery modules and between the battery module and the inner wall of the casing. The gap flow channel has a first end and a second end near the liquid inlet along the second direction, and a third end and a fourth end along the third direction.

[0008] A sealing unit is configured to be installed at the second, third, and fourth ends of the gap flow channel to seal the three ends;

[0009] A flow-blocking member is disposed inside the gap flow channel and is configured to form a flow-blocking position at least at the first end on a portion of the fluid flow path inside the gap flow channel.

[0010] The liquid inlet unit is installed inside the housing and is configured to communicate at least between the liquid inlet and the second end of the gap flow channel;

[0011] A top flow channel is formed between the battery module and the inner wall of the top of the housing, which is connected to the liquid outlet. An end flow channel is formed between the first end and the inner wall of the housing, which is connected to the gap flow channel and the top flow channel.

[0012] In addition to one or more of the above, or as an alternative, in another embodiment, the flow-blocking members are configured as a plurality and are equally spaced along a first direction at the first end, the second end, and other locations between the two of the gap flow channel.

[0013] In addition to one or more of the above, or as an alternative, in another embodiment, the flow-blocking member has two blocking surfaces along the second direction. The flow-blocking member located at the second end position is configured such that the blocking surface near the liquid inlet has a liquid inlet communicating with the liquid inlet unit, and the other blocking surface has multiple guide ports. The flow-blocking member located at other positions is configured such that both blocking surfaces have multiple guide ports.

[0014] In addition to one or more of the above, or as an alternative, in another embodiment, each of the flow-blocking members has multiple flow-guiding ports that are equally spaced along a third direction, and the cross-sectional area of ​​each flow-guiding port decreases sequentially along the third direction.

[0015] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0016] The bottom flow channel is formed in the gap between the battery module and the bottom surface of the housing and is connected to the end flow channel.

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

[0018] 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 that correspond one-to-one with the liquid inlet.

[0019] The first inclined plate is installed at an angle on the top of the liquid inlet housing near the liquid inlet, and is configured to guide the fluid at the liquid inlet to the liquid inlet.

[0020] In addition to one or more of the above, or as an alternative, in another embodiment, the liquid inlet unit further includes:

[0021] The flow guide housing is installed on the bottom surface of the box and located at the bottom of the liquid inlet housing. It is configured to be hollow inside and has a liquid inlet on the side near the liquid inlet. The flow guide housing has multiple liquid outlets on the side opposite to the liquid inlet that are connected to the bottom flow channel.

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

[0023] In addition to one or more of the above, or as an alternative, in another embodiment, the inlet includes an upper inlet and a lower inlet sequentially distributed along a second direction, the end of the first inclined plate opposite to the inlet housing is sealed to the inner wall of the box located above the upper inlet, and the end of the second inclined plate opposite to the flow guide housing is sealed to the inner wall of the box located above the lower inlet.

[0024] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0025] A return housing is fitted to the inner wall of the box located at the liquid outlet, and is configured to have multiple guide openings at the top along the battery module arrangement direction for connecting the top flow channel. A return space communicating with the liquid outlet is formed between the return housing and the inner wall of the box. The liquid outlet is located above the liquid inlet.

[0026] In addition to one or more of the above, or as an alternative, in another embodiment, the blocking unit includes:

[0027] The top seal is configured to fill one of the third and fourth ends of each of the gap channels in a one-to-one correspondence;

[0028] A bottom seal is configured to seal against the other of the third and fourth ends of each of the gap channels, and the two ends of the flow-blocking member abut against the top seal and the bottom seal, respectively;

[0029] A side seal, located at one end of the battery module near the liquid inlet, is configured to block one end of the gap flow channel.

[0030] In addition to one or more of the above, or as an alternative, in another embodiment, the top seal is configured to fill a sealing block between corresponding ends of two adjacent battery modules and / or between the battery module and the inner wall of the housing.

[0031] In addition to one or more of the above, or as an alternative, in another embodiment, the side seal is configured as a sealing plate and is bolted to the ends of two adjacent battery modules and / or between the battery module 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 bottom seal is configured as a support frame whose top surface extends a certain distance beyond the bottom surface of the housing, the support frames are spaced apart along a first direction at the bottom of the housing and correspond one-to-one with the gap channels, and the battery module is mounted above two adjacent support frames.

[0033] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0034] A lid, disposed on the side of the box body near the top flow channel, and / or,

[0035] An explosion-proof vent valve is installed on the cover of the enclosure and communicates with the internal space of the enclosure; and / or,

[0036] Reinforcing ribs are installed on the sides and bottom of the housing.

[0037] To achieve one of the aforementioned objectives, according to another aspect of this application, an energy storage system is provided, the energy storage system including a battery box as described in the foregoing aspect.

[0038] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up a gap flow channel, a sealing unit, a flow-blocking component, and a liquid inlet unit, the coolant can be effectively guided to flow evenly between battery modules. The coolant enters the housing from the liquid inlet, then passes through the gap flow channel, the end flow channel, and the top flow channel in sequence, and then flows out from the liquid outlet. The sealing unit ensures that the coolant can only flow through a specific path, avoiding short circuits. By setting up a flow-blocking component inside the gap flow channel and opening a guide port for fluid to pass through, the flow-blocking component can form a flow-blocking position inside the gap flow channel, increasing the flow resistance inside the gap flow channel and improving the coolant flow rate at the top position of the battery module away from the liquid inlet. This allows the coolant to be distributed more evenly throughout the battery housing, thereby improving the temperature uniformity of different positions of the battery, so as to achieve better temperature control and meet the uniform heat dissipation requirements of the battery. Attached Figure Description

[0039] 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.

[0040] In the picture:

[0041] Figure 1This is a three-dimensional structural diagram of a battery box provided in this application;

[0042] Figure 2 for Figure 1 Sectional view of AA;

[0043] Figure 3 for Figure 1 Enlarged view of a portion of point A in the middle;

[0044] Figure 4 for Figure 1 BB section view;

[0045] Figure 5 This is a three-dimensional structural diagram of a battery box when the outer casing is removed, as provided in this application;

[0046] Figure 6 for Figure 5 Enlarged view of a section at point B in the middle;

[0047] Figure 7 This is a partial cross-sectional view of the liquid inlet unit location of a battery box provided in this application;

[0048] Figure 8 This is a three-dimensional structural diagram of a battery box when the cover is removed, as provided in this application;

[0049] Figure 9 for Figure 8 Enlarged view of a section at point C;

[0050] Figure 10 This is a three-dimensional structural diagram of a top seal of a battery box located between two adjacent battery modules, as provided in this application.

[0051] Figure 11 This is a three-dimensional structural diagram of a top seal of a battery box located between the battery module and the box body, as provided in this application.

[0052] Figure 12 This is a three-dimensional structural diagram of a flow-blocking component located at the second end of a battery box provided in this application;

[0053] Figure 13 This is a three-dimensional structural diagram of a flow-blocking component located at another position in a battery box, as provided in this application;

[0054] Figure 14 This is a three-dimensional structural diagram of a liquid inlet unit for a battery box provided in this application;

[0055] Figure 15 This is a three-dimensional structural diagram of the connection between the liquid inlet shell and the liquid guide shell of a battery box provided in this application;

[0056] Figure 16This is a three-dimensional structural diagram of the connection between the liquid inlet housing and the liquid guide housing of a battery box provided in this application, from another perspective.

[0057] In the attached diagram: 1. Box body, 11. Liquid inlet, 111. Upper liquid inlet, 112. Lower liquid inlet, 12. Liquid outlet, 13. Box cover, 14. Explosion-proof vent valve, 2. Sealing unit, 21. Top seal, 22. Bottom seal, 23. Side seal, 3. Flow baffle, 31. Blocking surface, 32. Liquid inlet, 33. Flow guide, 4. Liquid inlet unit, 41. Liquid inlet housing, 411. Liquid inlet, 412. Liquid outlet, 42. First inclined plate, 43. Flow guide housing, 431. Flow guide inlet, 432. Flow guide outlet, 44. Second inclined plate, 5. Battery module, 6. Gap flow channel, 7. Top flow channel, 8. End flow channel, 9. Reinforcing rib, 10. Return housing, 101. Flow guide opening. Detailed Implementation

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] In existing technologies, battery boxes typically have an inlet and an outlet on the same side. Coolant enters the battery box through the inlet and flows out through the outlet. At the end furthest from the inlet, due to gravity, the coolant flow rate at the bottom of the battery is faster, while the coolant flow rate at the top of the battery is slower. This results in poor heat dissipation for the cells at the top, poor temperature uniformity of the batteries in different locations, and difficulty in meeting the battery's temperature uniformity requirements.

[0065] Figure 1 This is a perspective view of a battery box according to one embodiment of the present application. The battery box can be used in an energy storage system and includes: a box body 1 configured to be hollow internally and provided with an inlet 11 and an outlet 12; a plurality of battery modules 5 installed inside the box body 1 along a first direction; a gap channel 6 formed between two adjacent battery modules 5 and between the battery modules 5 and the inner wall of the box body 1; a first end and a second end near the inlet 11 of the gap channel 6 along a second direction; a third end and a fourth end of the gap channel 6 along a third direction; and other components configured to be installed in the gap channel. The second, third, and fourth ends of 6 are sealed by a sealing unit 2, which is disposed inside the gap channel 6, and a flow-blocking member 3 is configured to form a flow-blocking position on the fluid flow path inside the gap channel 6 at least at the first end. The liquid inlet unit 4 is configured to communicate at least between the liquid inlet 11 and the second end of the gap channel 6. A top flow channel 7 communicating with the liquid outlet 12 is formed between the battery module 5 and the top inner wall of the box 1, and an end flow channel 8 communicating with the gap channel 6 and the top flow channel 7 is formed between the first end and the inner wall of the box 1.

[0066] Under this arrangement, refer to Figures 1-4This paper describes a battery box that, by setting up a gap flow channel 6, a sealing unit 2, a flow-blocking component 3, and a liquid inlet unit 4, can effectively guide the coolant to flow evenly between battery modules 5. The coolant enters the box 1 from the liquid inlet 11, then passes through the gap flow channel 6, the end flow channel 8, and the top flow channel 7 in sequence, and then flows out from the liquid outlet 12. The sealing unit 2 ensures that the coolant can only flow through a specific path to avoid short circuits. By setting the flow-blocking component 3 inside the gap flow channel 6 and opening the guide port 33 for the fluid to pass through, the flow-blocking component 3 can form a flow-blocking position inside the gap flow channel 6, increasing the flow resistance inside the gap flow channel 6. When the coolant passes through the flow-blocking position, it will accumulate and raise the liquid level inside the gap flow channel 6, thereby increasing the coolant flow rate at the top position of the battery module 5 away from the liquid inlet 11, making the coolant more evenly distributed throughout the battery box, thereby improving the temperature uniformity of different positions of the battery, facilitating better temperature control, and meeting the uniform heat dissipation requirements of the battery.

[0067] It should be noted that, because the baffle component 3 increases the flow resistance inside the gap channel 6, the coolant, which originally flowed mostly from the bottom under the action of gravity, can now pass more through the battery located above under the action of resistance. This increases the flow rate of the coolant at the top of the battery and also increases the flow rate of the coolant at the top of the battery module 5 away from the inlet 11, thus improving the cooling effect at that location and further improving the temperature uniformity of the battery at different locations.

[0068] In actual operation, the guide port 33 provided in the above-mentioned flow-blocking component 3 can ensure the flow of a portion of the coolant, while other positions without guide ports 33 are used to form flow-blocking positions for the passage of some fluid. The two work together to achieve the dual effects of guiding flow and increasing flow resistance.

[0069] For example, the coolant inside the battery box can be selected from hydrofluoroether, silicone oil and hydrocarbons, etc. Since the working fluid does not undergo phase change, the coolant has good insulation, high specific heat capacity and thermal conductivity, good flame retardant properties, low cost, suitable operating temperature, long life, non-corrosiveness, low density and low viscosity.

[0070] It should be noted that the second end is the end closer to the liquid inlet 11, the first end is the end farther away from the liquid inlet 11, the third end is the top of the gap channel 6, and the fourth end is the bottom of the gap channel 6.

[0071] The following will illustrate further specific implementations or refinements of the board enclosure assembly through exemplary description, in order to further improve it or for other improvement considerations.

[0072] In one embodiment, reference is made to... Figures 4-8The flow-blocking members 3 are configured in multiples and are evenly distributed along the first direction at the first end, the second end and other positions between them of the gap flow channel 6.

[0073] It can be seen that the multiple baffle components 3 distributed at equal intervals along the first direction further enhance the uniform distribution of coolant, so that the batteries located at the second end near the inlet 11, the first end far from the inlet 11, and the middle position can all achieve the above effect. The multiple baffle components 3 work together to achieve uniform temperature of batteries at different positions, ensuring that each battery can be fully cooled, improving the overall heat dissipation effect, and reducing the risk of local overheating.

[0074] It should be noted that, in addition to being set at the first end and the second end, the above-mentioned baffle member 3 can also be set at multiple other positions between them. By using the equally spaced arrangement, the temperature uniformity effect can be further improved. Of course, the non-equally spaced arrangement can also be used. This embodiment does not make specific limitations here.

[0075] In another embodiment, reference is made to... Figure 6 , Figure 7 , Figure 12 and Figure 13 Each flow-blocking component 3 has multiple flow-guiding ports 33 at equal intervals along the third direction, and the cross-sectional area of ​​each flow-guiding port 33 decreases sequentially along the third direction.

[0076] It is easy to see that the guide ports 33 of each flow-blocking component 3 are opened at equal intervals along the third direction and the cross-sectional area decreases successively, so that the coolant gradually diffuses during the flow process. The flow rate of the coolant at different height positions is adjusted by using the cross-sectional area, which further improves the uniform distribution of the coolant and enhances the heat dissipation effect.

[0077] In actual operation, this embodiment should be referred to Figure 12 and Figure 13 The flow-blocking member 3 has two blocking surfaces 31 along the second direction. The flow-blocking member 3 located at the second end position is configured such that the blocking surface 31 near the liquid inlet 11 is provided with a liquid inlet 32 ​​communicating with the liquid inlet unit 4, and the other blocking surface 31 is provided with multiple guide ports 33. The flow-blocking member 3 located at other positions is configured such that both blocking surfaces 31 are provided with multiple guide ports 33.

[0078] It can be seen that the design of the two blocking surfaces 31 and the guide ports 33 formed by the flow-blocking member 3 along the second direction ensures that the coolant can flow smoothly into and out of the gap flow channel 6. At the same time, through the different configuration of the guide ports 33, the flow-blocking member 3 located on the side of the liquid inlet 11 can only enter the liquid from the liquid inlet 32 ​​and then exit the liquid from multiple guide ports 33 at the other end, while the flow-blocking members 3 at other positions can enter and exit the liquid from both ends, thereby optimizing the flow path of the coolant and improving the heat dissipation efficiency.

[0079] It should be noted that during the process of coolant flowing into the battery box, the coolant surface at the second end near the inlet 11 and the coolant surface at the first end away from the inlet 11 are at different heights at the beginning. The coolant distribution inside the battery box is uneven, and it takes a period of time to make the front and rear coolant surface heights consistent. By setting the flow-blocking component 3, under the condition that the coolant is not full, by increasing the flow resistance, the coolant surface height at the first end of the battery cell and the coolant surface height at the second end of the battery cell can reach the same height more quickly, which can also meet the requirement of quickly filling the coolant surface height at the gap.

[0080] Furthermore, it also includes a bottom flow channel formed in the gap between the battery module 5 and the bottom inner wall of the housing 1 and connected to the end flow channel 8.

[0081] It is easy to see that by setting the bottom flow channel, the flow of coolant at the bottom of the battery module 5 can be further increased, thereby improving the heat dissipation effect at the bottom of the battery. The bottom flow channel and the end flow channel 8 are connected, so that the coolant can be circulated along the preset flow path, and the bottom of the battery module 5 can also be effectively cooled.

[0082] In one embodiment, reference is made to... Figures 5-7 , Figures 14-16 The liquid inlet unit 4 includes: a liquid inlet housing 41 configured to be hollow inside and having a liquid inlet 411 on one side near the liquid inlet 11, and a first inclined plate 42 installed at the top of the liquid inlet housing 41 on the side near the liquid inlet 11. The liquid inlet housing 41 has a plurality of liquid inlet outlets 412 on the side away from the liquid inlet 411, which are connected to the liquid inlet 32 ​​one by one. The first inclined plate 42 is configured to guide the fluid at the liquid inlet 11 to the liquid inlet 411.

[0083] It can be seen that the liquid inlet housing 41 facilitates the flow of fluid from the liquid inlet 11 to the liquid inlet 32, thereby supplying liquid to the gap flow channel 6, while the first inclined plate 42 facilitates the flow of fluid from the liquid inlet 11 to the liquid inlet 411, ensuring smooth flow of fluid.

[0084] In another embodiment, the liquid inlet unit 4 further includes: a flow guide housing 43 installed on the bottom surface of the housing 1 and located at the bottom of the liquid inlet housing 41, and a second inclined plate 44 installed at the top of the flow guide housing 43 near the liquid inlet 11. The flow guide housing 43 is configured to be hollow inside and has a liquid inlet 431 on the side near the liquid inlet 11. The flow guide housing 43 has a plurality of liquid outlets 432 communicating with the bottom flow channel on the side away from the liquid inlet 431. The second inclined plate 44 is configured to guide the fluid at the liquid inlet 11 to the liquid inlet 431.

[0085] It is easy to see that the design of the flow guide shell 43 and the second inclined plate 44 further optimizes the flow path of the coolant, especially at the bottom of the housing 1, ensuring that the coolant can be evenly distributed to each bottom channel, thus improving the heat dissipation uniformity of the entire battery box.

[0086] Furthermore, the inlet 11 includes an upper inlet 111 and a lower inlet 112 distributed sequentially along a third direction. The end of the first inclined plate 42 facing away from the inlet housing 41 is sealed and connected to the inner wall of the box 1 located above the upper inlet 111. The end of the second inclined plate 44 facing away from the guide housing 43 is sealed and connected to the inner wall of the box 1 located above the lower inlet 112.

[0087] It can be seen that the liquid inlet 11 includes an upper liquid inlet 111 and a lower liquid inlet 112, and the flow is guided by a ramp, which further optimizes the introduction path of the coolant, ensures that the coolant can enter the interior of the housing 1 evenly, and improves the flow efficiency and heat dissipation effect of the coolant.

[0088] Furthermore, refer to Figure 8 and Figure 9 It also includes: a return housing 10 that is fitted and installed on the inner wall of the housing 1 located at the outlet 12. The return housing 10 is configured to have multiple guide openings 101 at its top along the arrangement direction of the battery modules 5 for connecting to the top flow channel 7. A return space communicating with the outlet 12 is formed between the return housing 10 and the inner wall of the housing 1. The outlet 12 is located above the inlet 11.

[0089] It can be seen that by using the return housing 10, the cross-sectional area of ​​the original liquid outlet 12 can be increased to the cross-sectional area of ​​the multiple guide ports 33, so that the liquid on both sides of the top of the module has the same flow rate as the liquid in the middle of the top of the module, and flows into the return housing 10 at the same time, thereby solving the problem of slow local liquid flow at the top of the module caused by the small cross-sectional area of ​​the liquid outlet 12.

[0090] For example, the aforementioned return housing 10 can be a sheet metal liquid collection box fixed on the inner wall of the housing 1, and its guide port 33 can be configured in multiple ways as needed. This embodiment does not make specific limitations here.

[0091] In one scenario of this embodiment, reference is made. Figures 1-5 , Figure 10 and Figure 11 The sealing unit 2 includes: a top seal 21 configured to fill one of the third and fourth ends of each gap channel 6 in a one-to-one correspondence; a bottom seal 22 configured to seal and fit the other of the third and fourth ends of each gap channel 6; and a side seal 23 disposed at one end of the battery module 5 near the liquid inlet 11. The two ends of the flow-blocking member 3 abut against the top seal 21 and the bottom seal 22 respectively. The side seal 23 is configured to be opposite to the gap to seal one end of it.

[0092] It is easy to see that the top seal 21, bottom seal 22 and side seal 23 are designed to block the top, bottom and one side of the liquid inlet 11 of the gap flow channel 6, thereby facilitating the formation of a circulating flow channel structure consisting of the gap flow channel 6, the end flow channel 8 and the top flow channel 7.

[0093] For example, refer to Figure 10 and Figure 11 The top seal 21 is configured to fill the gap between the corresponding ends of two adjacent battery modules 5 and / or between the battery module 5 and the inner wall of the housing 1.

[0094] In a more specific implementation, such as Figure 10 As shown, the sealing block located between two adjacent battery modules 5 is constructed as a T-shaped block, such as... Figure 11 As shown, the sealing block located between the battery module 5 and the inner wall of the housing 1 is constructed as a bent block.

[0095] In another embodiment, reference is made to... Figure 4 and Figure 5 The side seal 23 is configured as a sealing plate and is fixedly connected by bolts between the ends of two adjacent battery modules 5 and / or between the battery module 5 and the inner wall of the housing 1.

[0096] It can be seen that the side seal 23 is fixedly connected by bolts, which ensures the firmness and reliability of the seal, further prevents coolant short circuit, and improves the flow efficiency and heat dissipation effect of coolant.

[0097] In another embodiment, reference is made to... Figure 3 and Figure 14 The bottom seal 22 is configured as a support frame whose top surface extends a certain distance beyond the bottom surface of the housing 1. The support frames are arranged at intervals along the first direction at the bottom of the housing 1 and correspond one-to-one with the gap flow channel 6. The battery module 5 is installed above two adjacent support frames.

[0098] It can be seen that by setting the bottom seal 22 as a support frame, the bottom flow channel mentioned above can be formed between the support frame, the inner wall of the housing 1, and the battery module 5. At the same time, it provides a structural basis for the installation of the battery module 5. The battery module 5 is installed between two adjacent support frames, which effectively ensures the bottom sealing of the gap flow channel 6 and the bottom flow channel formed between the battery module 5 and the inner bottom surface of the housing 1, which facilitates the flow of coolant from the bottom.

[0099] In actual operation, this embodiment should be referred to Figure 1 and Figure 2It also includes: a cover 13 on the side of the housing 1 near the top flow channel 7, and / or an explosion-proof vent valve 14 disposed on the cover 13 and communicating with the internal space of the housing 1; and / or reinforcing ribs 9 installed on the side and bottom of the housing 1.

[0100] It is easy to see that by setting the cover 13, the explosion-proof vent valve 14 and the reinforcing rib 9, not only is the safety performance of the battery box improved, but the circulation of coolant is also ensured, thereby further improving the overall heat dissipation effect and the stability of the battery box.

[0101] This embodiment also provides an energy storage system, including the battery box as described above.

[0102] It can be seen that by applying the above-mentioned battery box to the energy storage system, the coolant can be effectively guided to flow evenly between the battery modules 5. The coolant enters the box 1 from the inlet 11, and then flows through the gap channel 6, the end channel 8 and the top channel 7 in sequence, and then flows out from the outlet 12. By setting the sealing unit 2, it is ensured that the coolant can only flow through a specific path to avoid short circuits. By setting the flow-blocking component 3 inside the gap channel 6 and opening the guide port 33 for the fluid to pass through, the flow-blocking component 3 can form a flow-blocking position in the gap channel 6, increasing the flow resistance inside the gap channel 6 and increasing the coolant flow rate at the top position of the battery module 5 away from the inlet 11. This makes the coolant more evenly distributed throughout the battery box, thereby improving the temperature uniformity of different positions of the battery, so as to achieve better temperature control and meet the uniform heat dissipation requirements of the battery.

[0103] The above examples primarily illustrate a battery box and an energy storage system including the 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. A battery box, characterized in that, include: The housing is configured to be hollow inside and has a liquid inlet and a liquid outlet. Multiple battery modules are installed inside the housing along a first direction. A gap flow channel is formed between two adjacent battery modules and between the battery module and the inner wall of the casing. The gap flow channel has a first end and a second end near the liquid inlet along the second direction, and a third end and a fourth end along the third direction. A sealing unit is configured to be installed at the second, third, and fourth ends of the gap flow channel to seal the three ends; A flow-blocking member is disposed inside the gap flow channel and is configured to form a flow-blocking position at least at the first end on a portion of the fluid flow path inside the gap flow channel. The liquid inlet unit is installed inside the housing and is configured to communicate at least between the liquid inlet and the second end of the gap flow channel; A top flow channel is formed between the battery module and the inner wall of the top of the housing, which is connected to the liquid outlet. An end flow channel is formed between the first end and the inner wall of the housing, which is connected to the gap flow channel and the top flow channel.

2. The battery box according to claim 1, characterized in that, The flow-blocking components are configured in multiples and are distributed at equal intervals along a first direction at the first end, the second end, and other positions between the two of the gap flow channel.

3. A battery box according to claim 1 or 2, characterized in that, The flow-blocking member has two blocking surfaces along the second direction. The flow-blocking member located at the second end position is configured such that the blocking surface near the liquid inlet has a liquid inlet communicating with the liquid inlet unit, and the other blocking surface has multiple guide ports. The flow-blocking members located at other positions are configured such that both blocking surfaces have multiple guide ports.

4. A battery box according to claim 3, characterized in that, Each of the flow-blocking components has multiple flow-guiding ports that are equally spaced along a third direction, and the cross-sectional area of ​​each flow-guiding port decreases sequentially along the third direction.

5. A battery box according to claim 3, characterized in that, Also includes: The bottom flow channel is formed in the gap between the battery module and the bottom surface of the housing and is connected to the end flow channel.

6. A battery box according to claim 5, characterized in that, The liquid inlet unit 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 that correspond one-to-one with the liquid inlet. The first inclined plate is installed at an angle on the top of the liquid inlet housing near the liquid inlet, and is configured to guide the fluid at the liquid inlet to the liquid inlet.

7. A battery box according to claim 6, characterized in that, The liquid inlet unit further includes: The flow guide housing is installed on the bottom surface of the box and located at the bottom of the liquid inlet housing. It is configured to be hollow inside and has a liquid inlet on the side near the liquid inlet. The flow guide housing has multiple liquid outlets on the side opposite to the liquid inlet that communicate with the bottom flow channel. The second inclined plate is installed at an angle on the top of the flow guide housing near the liquid inlet, and is configured to guide the fluid at the liquid inlet to the liquid guide inlet.

8. A battery box according to claim 7, characterized in that, The liquid inlet includes an upper liquid inlet and a lower liquid inlet distributed sequentially along a third direction. The end of the first inclined plate opposite to the liquid inlet housing is sealed and connected to the inner wall of the box located above the upper liquid inlet. The end of the second inclined plate opposite to the flow guide housing is sealed and connected to the inner wall of the box located above the lower liquid inlet.

9. A battery box according to claim 1, characterized in that, Also includes: A return housing is fitted to the inner wall of the box located at the liquid outlet, and is configured to have multiple guide openings at the top along the battery module arrangement direction for connecting the top flow channel. A return space communicating with the liquid outlet is formed between the return housing and the inner wall of the box. The liquid outlet is located above the liquid inlet.

10. A battery box according to claim 1, characterized in that, The blocking unit includes: The top seal is configured to fill one of the third and fourth ends of each of the gap channels in a one-to-one correspondence; A bottom seal is configured to seal against the other of the third and fourth ends of each of the gap channels, and the two ends of the flow-blocking member abut against the top seal and the bottom seal, respectively; A side seal, located at one end of the battery module near the liquid inlet, is configured to block one end of the gap flow channel.

11. A battery box according to claim 10, characterized in that, The top seal is configured as a sealing block that fills between corresponding ends of two adjacent battery modules and / or between the battery module and the inner wall of the housing.

12. A battery box according to claim 10, characterized in that, The side seal is configured as a sealing plate and is fixedly connected by bolts between the ends of two adjacent battery modules and / or between the battery module and the inner wall of the casing.

13. A battery box according to claim 10, characterized in that, The bottom seal is configured as a support frame whose top surface extends a certain distance beyond the bottom surface of the box. The support frames are arranged at intervals along the first direction at the bottom of the box and correspond one-to-one with the gap flow channel. The battery module is installed above two adjacent support frames.

14. A battery box according to claim 1, characterized in that, Also includes: A lid, disposed on the side of the box body near the top flow channel, 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 sides and bottom of the housing.

15. An energy storage system, characterized in that, Includes a battery box as described in any one of claims 1-14.

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