Battery box and energy storage system with same

Abstract

The utility model relates to the technical field of batteries, in particular to a battery box, and further relates to an energy storage system comprising the battery box. The battery box comprises an outer shell, an inner shell and a blocking component, a containing space is formed in the outer shell, the inner shell is distributed on the inner walls of the two sides, in the first direction, of the outer shell and the inner wall of one side, in the second direction, of the outer shell, the blocking component is arranged in the containing space, and one side of the blocking component is connected to the inner shell to define a battery cavity. One side of the inner shell and the outer shell form a battery cavity, the other side of the inner shell and the outer shell form an electric cavity, a flow guide space communicated with air flow of the battery cavity is arranged between the inner shell and the outer shell in a surrounding manner, and the explosion-proof valve is arranged on the outer wall of the outer shell and is configured to communicate the flow guide space with the outside when the flow guide space reaches preset air pressure; the high-temperature flue gas is effectively prevented from diffusing to the electrical cavity by utilizing the blocking component, and the flue gas can be quickly discharged, so that the fire phenomenon of electrical parts is effectively reduced, and the influence of the fire of the whole battery on other surrounding battery boxes is reduced.

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 development of the energy storage industry, battery systems based on secondary battery packs have been widely used. The battery enclosure is an important component of the energy storage power system. Individual cells, structural components, and electrical components are integrated through the battery enclosure to form the smallest power system unit. The battery enclosure needs to support the cells and other components, while also considering issues such as strength, sealing, and cost. With the large-scale promotion and use of battery enclosures, battery thermal runaway has also become an important consideration in the design process.

[0003] The battery box contains battery cells and electrical components. When the battery cells inside the battery box experience thermal runaway, the generated high-temperature fumes will spread inside the box. If the fumes are not discharged from the battery box in time, the high-temperature fumes are likely to ignite when they come into contact with the internal electrical components. Once the entire battery box catches fire, it will affect other battery boxes in the vicinity, which may lead to a larger fire. Therefore, this application proposes a battery box and an energy storage system with the same. Utility Model Content

[0004] The purpose of this utility model is to provide a battery box and an energy storage system thereon, which aims to improve the efficiency of smoke exhaust when the battery cells inside the battery box experience thermal runaway, and reduce the impact of fires caused by electrical components on other battery boxes in the vicinity.

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

[0006] The outer casing is configured to have an internal accommodating space.

[0007] The inner shell is configured to be distributed on both inner walls of the outer shell along a first direction and on one inner wall along a second direction;

[0008] A barrier component, built into the accommodating space, is configured to join the inner housing on one side to form a battery cavity, and to form an electrical cavity with the outer housing on the other side. A flow guiding space communicating with the airflow of the battery cavity is provided between the inner housing and the outer housing.

[0009] An explosion-proof valve is disposed on the outer wall of the housing and configured to connect it to the outside when the flow space reaches a preset air pressure.

[0010] In addition to one or more of the above, or as an alternative, in another embodiment, the bottom end of the inner housing is provided with a through-hole along the thickness direction, and the through-hole is configured in multiple ways and communicates with the flow space and the battery cavity.

[0011] In addition to one or more of the above, or as an alternative, in another embodiment, the bottom end of the inner housing is provided with a lower edge extending toward the outer housing and for fitting against the bottom surface of the inner housing, and the air vents are opened at the corner of the lower edge and are provided at equal intervals along the length direction of the lower edge.

[0012] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0013] The inner edge is configured to extend from the top of the outer casing toward its interior;

[0014] The upper edge portion is disposed at the top of the inner shell and extends toward the outer shell, and is configured to fit against the lower part of the inner edge portion. The inner wall of the outer shell, the outer wall of the inner shell, the inner edge portion, the upper edge portion, and the lower edge portion together form the flow guiding space.

[0015] In addition to one or more of the above, or as an alternative, in another embodiment, the inner housing includes:

[0016] The first inner plate is configured as two and is respectively arranged on the inner walls of both sides of the outer shell along the first direction. Each first inner plate has a support block at the top of the end near the barrier member.

[0017] The second inner plate is disposed on one side of the inner wall of the outer shell along the second direction and its two ends overlap with the two first inner plates respectively. The end of the first inner plate opposite to the second inner plate extends to the position of the barrier member.

[0018] In addition to one or more of the above, or as an alternative, in another embodiment, the second inner plate is provided with a plurality of flow guides at equal intervals along a first direction, the flow guides being configured to extend through the thickness direction of the second inner plate.

[0019] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0020] A pressure plate, disposed on the top of the battery cavity and pressed against the inner housing, is configured to be bonded and fixed to the battery cells located inside the battery cavity by applying adhesive. The end of the pressure plate near the barrier member is provided with two adapter pieces for pressing against the support block in a one-to-one correspondence.

[0021] In addition to one or more of the above, or as an alternative, in another embodiment, the barrier member is configured as a barrier plate that is detachably installed in the accommodating space and flush with one end of the two first inner plates opposite to the second inner plate.

[0022] In addition to one or more of the above, or as an alternative, in another embodiment, the barrier plate is provided with two symmetrical lugs at the top of both ends along the first direction, and the two lugs are connected to the two adapter pieces one to one by bolts.

[0023] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0024] The battery module is fixedly installed inside the battery cavity, and / or

[0025] The BMU board is detachably mounted on the side of the barrier member away from the battery cavity via a mounting bracket.

[0026] In addition to one or more of the above, or as an alternative, in other embodiments, it also includes:

[0027] The top cover is detachably connected to the top of the housing by bolts, and / or

[0028] A sealing ring is installed on the top of the housing and configured to seal and fill the gap between the top cover and the housing.

[0029] In addition to one or more of the above, or as an alternative, in another embodiment, the explosion-proof valve is fixedly mounted on the outer wall of the outer shell and configured to be opposite to one side of the outer wall of the inner shell along a second direction.

[0030] 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 the battery box described in the foregoing aspect.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting an inner shell inside the outer shell, a guiding space for rapid entry of flue gas can be formed between the inner shell and the outer shell. Utilizing an explosion-proof valve connected to the guiding space, when the flue gas generated by thermal runaway of some battery cells exceeds a certain pressure, it is easy to quickly discharge it from the outer shell, thereby effectively improving the discharge efficiency of flue gas when the battery cells inside the battery box experience thermal runaway, and also reducing the diffusion of high-temperature flue gas into the electrical cavity. By setting a barrier component, the internal space of the outer shell can be easily divided into a battery cavity and an electrical cavity. Thus, when a battery cell located inside the battery cavity experiences thermal runaway, the barrier component effectively blocks the diffusion of high-temperature flue gas into the electrical cavity. Combined with the rapid discharge of flue gas through the guiding space, this effectively reduces the phenomenon of electrical components catching fire, thereby reducing the impact of a fire in the entire battery on other battery boxes in the vicinity. Attached Figure Description

[0032] 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.

[0033] In the picture:

[0034] Figure 1 This is a three-dimensional structural diagram of a battery box according to this application;

[0035] Figure 2 This is a three-dimensional structural schematic diagram of a battery box according to this application from another perspective;

[0036] Figure 3 This is a three-dimensional structural diagram of a battery box with the top cover and internal battery module removed according to this application;

[0037] Figure 4 This is a three-dimensional structural diagram of the inner shell of a battery box according to this application;

[0038] Figure 5 This is a three-dimensional structural diagram of the outer shell of a battery box according to this application;

[0039] Figure 6 For example Figure 1 Sectional view of AA;

[0040] Figure 7 For example Figure 1 BB section view;

[0041] Figure 8 for Figure 7 Enlarged view of a portion of point A in the middle;

[0042] Figure 9 This is a three-dimensional structural diagram of a battery box with the top cover removed, according to this application.

[0043] In the attached diagram: 1 Outer shell, 2 Inner shell, 21 Air vent, 22 Lower edge, 23 Upper edge, 24 First inner plate, 25 Second inner plate, 26 Support block, 27 Flow guide, 3 Barrier component, 4 Explosion-proof valve, 5 Battery cavity, 6 Electrical cavity, 7 Pressure plate, 8 Sealing ring, 9 BMU plate, 10 Top cover, 11 Inner edge, 12 Support lug. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] A battery system typically comprises several individual battery cells, a casing, a battery management system, and related mounting structures, as well as various electrical components to maintain the normal operation of the entire battery pack. In existing battery packs, when a cell experiences thermal runaway, the high-temperature fumes generated by the cell spread within the casing. If these fumes are not promptly expelled, they can easily ignite upon contact with internal electrical components, leading to a fire that can ignite the entire battery pack, impacting other battery packs and causing a wider range of thermal runaway. Therefore, it is necessary to address the high-temperature gases generated during thermal runaway within the battery pack's cells to prevent a larger-scale fire within the battery pack.

[0051] 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 for energy storage batteries and includes: an outer shell 1 configured to form an accommodating space inside; an inner shell 2 configured to be distributed on both inner walls of the outer shell 1 along a first direction and on one inner wall along a second direction; a barrier member 3 built into the accommodating space; the barrier member 3 is configured to be joined to the inner shell 2 on one side to form a battery cavity 5, and to form an electrical cavity 6 with the outer shell 1 on the other side; a flow guiding space is provided between the inner shell 2 and the outer shell 1 to conduct airflow through the battery cavity 5; and an explosion-proof valve 4 is disposed on the outer wall of the outer shell 1 and configured to connect the flow guiding space to the outside when the flow guiding space reaches a preset air pressure.

[0052] refer to Figures 1-5 In this arrangement, the battery box described herein has an inner shell 2 inside the outer shell 1, which forms a flow space between the inner shell 2 and the outer shell 1 to allow smoke to enter quickly. An explosion-proof valve 4 connected to the flow space facilitates the rapid discharge of smoke generated by thermal runaway of some battery cells from the outer shell 1 when the pressure exceeds a certain level. This effectively improves the smoke discharge efficiency when battery cells experience thermal runaway and reduces the diffusion of hot smoke into the electrical cavity 6. By setting a barrier component 3, the internal space of the outer shell 1 is divided into a battery cavity 5 and an electrical cavity 6. When a battery cell located in the battery cavity 5 experiences thermal runaway, the barrier component 3 effectively blocks the diffusion of high-temperature smoke into the electrical cavity 6. Combined with the rapid discharge of smoke through the flow space, this effectively reduces the possibility of fires in electrical components, thereby reducing the impact of a fire on other battery boxes in the vicinity.

[0053] Specifically, the battery compartment 5 contains a battery module, which is formed by stacking multiple cells. When some cells experience thermal runaway, the main manifestation is the generation of high-temperature smoke. If the smoke cannot be quickly discharged from the compartment, it will spread to the electrical components and, upon contact, easily cause the electrical components to catch fire, which in turn leads to a fire in the entire battery pack. Centralized energy storage systems generally contain multiple battery boxes. If a battery pack catches fire, the fire will spread rapidly, causing other battery packs around it to catch fire, resulting in serious economic losses. This application changes the internal layout of the battery box and utilizes the flow-guiding space of the inner shell 2 and the outer shell 1 to quickly discharge the high-temperature smoke generated by the thermally runaway cells. Combined with the setting of the blocking component 3, it can effectively reduce the possibility of the battery pack catching fire during thermal runaway and reduce the impact on the surrounding battery packs.

[0054] refer to Figure 3 It should be noted that the explosion-proof valve 4 mentioned above is a safety valve, mainly used in rechargeable batteries such as lithium-ion batteries. When the internal pressure of the battery box rises abnormally, the valve is opened to release gas or vapor, thereby preventing the battery from exploding or rupturing due to excessive internal pressure and ensuring the rapid discharge of high-temperature flue gas.

[0055] For example, the aforementioned barrier member 3 can be a structure that seals and isolates the battery cavity 5 and the electrical cavity 6, or it can isolate most of the connection between the battery cavity 5 and the electrical cavity 6, with a small portion used for wiring and remaining connected; as long as it can block the high-temperature flue gas inside the battery cavity 5, thereby reducing the impact on the electrical components inside the electrical cavity 6, this embodiment does not make specific limitations here.

[0056] For example, the first direction can be the length direction of the outer shell 1, and the second direction can be the width direction of the outer shell 1. The outer shell 1 has a first end and a second end opposite to each other along the first direction, and a third end opposite to each other along the second direction. Thus, the inner shell 2 can be installed at the first end, the second end and the third end of the outer shell 1 inside the battery cavity 5. The barrier member 3 is located at the end of the inner shell 2. The battery cavity 5 is formed between the three walls of the inner shell 2 and the barrier member 3. Of course, the first direction can also be the width direction of the outer shell 1 and the second direction can be the length direction of the outer shell 1. This embodiment does not make specific limitations here.

[0057] 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.

[0058] In one embodiment, reference is made to... Figure 4The bottom end of the inner shell 2 is provided with a through-hole 21 along the thickness direction. The through-hole 21 is configured in multiple ways and is connected to the flow space and the battery cavity 5.

[0059] It is easy to see that since the density of high-temperature flue gas is greater than that of air, it mainly settles at the bottom. By setting the air guide port 21 at the bottom of the inner shell 2, the flue gas can be quickly introduced into the above-mentioned guide space, so that it can be quickly discharged from the battery box.

[0060] Based on this, refer to Figure 4 The bottom end of the inner shell 2 is provided with a lower edge portion 22 extending toward the outer shell 1 and used to fit against the inner bottom surface of the outer shell 1. The air vent 21 is opened at the corner of the lower edge portion 22 and is provided at equal intervals along the length direction of the lower edge portion 22.

[0061] It can be seen that by providing a lower edge 22 at the bottom of the inner shell 2, it is easy to fit and install it on the inner bottom surface of the outer shell 1. The air vent 21 is opened at the bottom of the inner shell 2. On the one hand, it is easy to introduce the gas inside the battery cavity 5 into the flow space through the air vent 21; on the other hand, it is also easy to use the air vent 21 to weld on the lower edge 22, thereby fixing the inner shell 2 to the outer shell 1.

[0062] For example, the air inlet 21 can be opened at the bottom surface of the inner shell 2 or at the bottom end of the inner shell 2. Its shape can be square, round or triangular, etc., and its distribution can be evenly spaced or irregularly distributed. This embodiment does not make specific limitations here.

[0063] In another embodiment, reference is made to... Figures 4-8 It also includes: an inner edge portion 11 configured to extend from the top of the outer shell 1 toward its interior, and an upper edge portion 23 disposed at the top of the inner shell 2 and extending toward the outer shell 1. The upper edge portion 23 is configured to fit against the lower part of the inner edge portion 11. The inner wall of the outer shell 1, the outer wall of the inner shell 2, the inner edge portion 11, the upper edge portion 23, and the lower edge portion 22 together form the flow guiding space.

[0064] It can be seen that by providing an inner edge 11 at the top of the outer shell 1 and an upper edge 23 at the top of the inner shell 2, the two can cooperate to achieve the connection between the upper end of the inner shell 2 and the outer shell 1, and also facilitate the formation of the above-mentioned flow guiding space.

[0065] For example, the inner edge portion 11 has a plurality of first mounting holes along its length, and the upper edge portion 23 has a plurality of second mounting holes corresponding to the mounting holes one by one. The two are fixed by fasteners that pass through the first mounting holes and the second mounting holes in sequence.

[0066] In actual operation, one of the inner edge portion 11 and the upper edge portion 23 is provided with a threaded hole, and the other is provided with a smooth hole. The two are fixed by bolts that are sequentially inserted into the threaded hole and the smooth hole.

[0067] In a more specific implementation, refer to Figures 4-6 The inner shell 2 includes: two first inner plates 24 respectively disposed on the inner walls of the outer shell 1 along the first direction, and a second inner plate 25 disposed on one inner wall of the outer shell 1 along the second direction and overlapping the two first inner plates 24 at both ends. Each first inner plate 24 has a support block 26 at the top of one end near the barrier member 3. The end of the first inner plate 24 away from the second inner plate 25 extends to the position of the barrier member 3.

[0068] Under this arrangement, refer to Figures 4-6 By setting two first inner plates 24 and one second inner plate 25, the three can be connected to form the inner shell 2. The end of the first inner plate 24 away from the second inner plate 25 extends to the position of the barrier member 3, so as to cooperate with the barrier member 3 to form the battery cavity 5. The arrangement of the first inner plate 24 and the second inner plate 25 also facilitates installation and disassembly.

[0069] It should be noted that the extension position of the first inner plate 24 can be at the position aligned with the barrier member 3, or it can be located inside the battery cavity 5 and not exceed the barrier member 3. The inner shell 2 can adopt the above-mentioned split installation method, or it can be set as an integrated structure with three sides fixed. This embodiment does not make specific limitations here.

[0070] Based on this, refer to Figures 4-8 The second inner plate 25 is provided with a plurality of flow guide ports 27 at equal intervals along the first direction, and the flow guide ports 27 are configured to extend through the thickness direction of the second inner plate 25.

[0071] It can be seen that the through-hole 27 on the second inner plate 25 increases the gas flow efficiency at the explosion-proof valve 4 and also saves the weight of the second inner plate 25, thus saving material costs.

[0072] For example, the above-mentioned guide ports 27 are arranged at equal intervals along the first direction. Of course, other numbers can also be set according to the length of the outer shell 1. This embodiment does not make specific limitations here.

[0073] In one embodiment, reference is made to... Figure 9It also includes: a pressure plate 7 disposed on the top of the battery cavity 5 and pressed against the inner shell 2. The pressure plate 7 is configured to be bonded and fixed to the battery cell located inside the battery cavity 5 by applying adhesive. The end of the pressure plate 7 near the barrier member 3 is provided with two adapter pieces for pressing against the support block 26 in a corresponding manner.

[0074] It is easy to see that by setting a pressure plate 7 on the top of the battery cavity 5 for pressing onto the inner shell 2, it is convenient to use adhesive to bond and fix the battery cell, while the two adapter pieces set near the end of the barrier member 3 can fix it, ensuring effective limitation of the battery cell inside the battery cavity 5.

[0075] In actual operation, the barrier member 3 is configured as a barrier plate that can be detachably installed in the accommodating space and is flush with the end of the two first inner plates 24 that is away from the second inner plate 25.

[0076] For example, the barrier member 3 can be a barrier plate or a blocking block fixed inside the outer shell 1. Its main function is to block the diffusion of high-temperature flue gas generated inside the battery cavity 5. It can also be used to install electrical components inside the electrical compartment. The specific shape and structure of the member are not specifically limited in this embodiment.

[0077] In one embodiment, reference is made to... Figures 4-8 The barrier plate has two symmetrical lugs 12 at its top ends along the first direction, and the two lugs 12 are connected to the two adapter pieces one by one by bolts.

[0078] It can be seen that by symmetrically setting the lugs 12 at the top of both ends of the barrier plate, it is easy to fix it to the two connecting pieces with bolts. The entire clamping plate 7 is fixed above the battery cell. Therefore, the clamping plate 7 can be fixed to the two support blocks 26 of the first inner plate 24 firstly through the two adapter pieces, and then the lugs 12 of the barrier plate can be fixed to the two adapter pieces, which makes it easy to disassemble the barrier plate separately.

[0079] In addition, since the top of the battery cell is bonded with a pressure plate 7, even during the process of installing or removing the barrier plate, the external parts will not fall onto the battery cells inside the battery cavity 5, thus effectively protecting the safety of the battery cells inside the battery cavity 5 and further improving the protection effect of the battery cells in the battery box.

[0080] In another embodiment, the battery box further includes: a battery module fixedly installed inside the battery cavity 5, and a BMU plate 9 detachably installed on the side of the barrier member 3 facing away from the battery cavity 5 via a mounting bracket.

[0081] It can be seen that by using the mounting bracket to install the BMU plate 9 on the side of the barrier component 3 away from the battery cavity 5, the influence of the flue gas in the battery cavity 5 on the BMU can be effectively avoided. In addition, under the isolation effect of the mounting bracket, the heat transfer to the BMU can be effectively reduced, further ensuring the functional stability of the BMU.

[0082] It should be noted that the BMU mentioned above stands for Battery Management Unit, which is an electronic control device mainly used to monitor and manage a battery pack composed of multiple battery cells. It is crucial for ensuring the safe operation of the battery pack, extending battery life, and optimizing performance.

[0083] In actual operation, this embodiment should be referred to Figures 3-8 It also includes: a top cover 10 detachably connected to the top of the housing 1 by bolts, and a sealing ring 8 installed on the top of the housing 1, wherein the sealing ring 8 is configured to seal and fill the gap between the top cover 10 and the housing 1.

[0084] It is easy to see that by setting the top cover 10 and the sealing ring 8 on the top of the outer casing 1, it is easy to ensure the connection and sealing of the top of the outer casing 1. In addition, it is also easy to remove the top cover 10 with bolts and then install and remove the internal barrier component 3 and BMU. The setting of the sealing ring 8 ensures the sealing of the internal battery cell.

[0085] For example, refer to Figures 3-6 The explosion-proof valve 4 is fixedly installed on the outer wall of the outer shell 1 and is configured to be opposite to one side of the outer wall of the inner shell 2 along the second direction.

[0086] More specifically, the explosion-proof valve 4 is fixedly installed on the outer wall of the third end of the outer casing 1.

[0087] It can be understood that by setting the explosion-proof valve 4 at the third end of the outer casing 1, the explosion-proof valve 4 is located in the middle position, and can quickly receive high-temperature hot air from the guide space located at the first end, the second end and the third end.

[0088] This embodiment also proposes an energy storage system, including a battery box as described above.

[0089] In practical operation, this embodiment, by applying the aforementioned battery box to an energy storage system, can effectively improve the exhaust efficiency of flue gas during thermal runaway of the battery cells inside the battery box, and also reduce the diffusion of hot flue gas into the electrical cavity 6. By setting the barrier component 3, the internal accommodating space of the outer shell 1 can be easily divided into the battery cavity 5 and the electrical cavity 6. Thus, when the battery cells located inside the battery cavity 5 experience thermal runaway, the barrier component 3 effectively blocks the diffusion of high-temperature flue gas into the electrical cavity 6. Combined with the rapid discharge of flue gas through the guide space, this effectively reduces the phenomenon of electrical components catching fire, thereby reducing the impact of a fire in the entire battery on other battery boxes around it, reducing the risk of large-scale thermal runaway of the energy storage system, and improving the safety and reliability of the entire energy storage system.

[0090] The above examples primarily illustrate the battery box and energy storage system including the battery box of 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 outer casing is configured to have an internal accommodating space. The inner shell is configured to be distributed on both inner walls of the outer shell along a first direction and on one inner wall along a second direction; A barrier component, built into the accommodating space, is configured to join the inner housing on one side to form a battery cavity, and to form an electrical cavity with the outer housing on the other side. A flow guiding space communicating with the airflow of the battery cavity is provided between the inner housing and the outer housing. An explosion-proof valve is disposed on the outer wall of the housing and configured to connect it to the outside when the flow space reaches a preset air pressure.

2. The battery box according to claim 1, characterized in that, The bottom end of the inner shell is provided with a vent through the thickness direction, and the vent is configured in multiple ways and connected to the flow space and the battery cavity.

3. A battery box according to claim 2, characterized in that, The bottom end of the inner shell is provided with a lower edge extending toward the outer shell and for fitting against the bottom surface of the inner shell. The air vents are opened at the corner of the lower edge and are provided at equal intervals along the length of the lower edge.

4. A battery box according to claim 3, characterized in that, Also includes: The inner edge is configured to extend from the top of the outer casing toward its interior; The upper edge portion is disposed at the top of the inner shell and extends toward the outer shell, and is configured to fit against the lower part of the inner edge portion. The inner wall of the outer shell, the outer wall of the inner shell, the inner edge portion, the upper edge portion, and the lower edge portion together form the flow guiding space.

5. A battery box according to any one of claims 1-4, characterized in that, The inner shell includes: The first inner plate is configured as two and is respectively arranged on the inner walls of both sides of the outer shell along the first direction. Each first inner plate has a support block at the top of the end near the barrier member. The second inner plate is disposed on one side of the inner wall of the outer shell along the second direction and its two ends overlap with the two first inner plates respectively. The end of the first inner plate opposite to the second inner plate extends to the position of the barrier member.

6. A battery box according to claim 5, characterized in that, The second inner plate is provided with a plurality of flow guides at equal intervals along the first direction, and the flow guides are configured to extend through the thickness direction of the second inner plate.

7. A battery box according to claim 5, characterized in that, Also includes: A pressure plate, disposed on the top of the battery cavity and pressed against the inner housing, is configured to be bonded and fixed to the battery cells located inside the battery cavity by applying adhesive. The end of the pressure plate near the barrier member is provided with two adapter pieces for pressing against the support block in a one-to-one correspondence.

8. A battery box according to claim 7, characterized in that, The barrier component is configured as a barrier plate that can be detachably installed in the accommodating space and is flush with one end of the two first inner plates opposite to the second inner plate.

9. A battery box according to claim 8, characterized in that, The barrier plate has two symmetrical lugs at its top ends along the first direction, and the two lugs are connected to the two adapter pieces one to one by bolts.

10. A battery box according to claim 1, characterized in that, Also includes: The battery module is fixedly installed inside the battery cavity, and / or The BMU board is detachably mounted on the side of the barrier member away from the battery cavity via a mounting bracket.

11. A battery box according to claim 1, characterized in that, Also includes: The top cover is detachably connected to the top of the housing by bolts, and / or A sealing ring is installed on the top of the housing and configured to seal and fill the gap between the top cover and the housing.

12. A battery box according to claim 1, characterized in that, The explosion-proof valve is fixedly installed on the outer wall of the outer shell and is configured to be opposite to one side of the outer wall of the inner shell along the second direction.

13. An energy storage system, characterized in that, It also includes the battery box as described in any one of claims 1-12.

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