Battery pack and energy storage device

Abstract

The application provides a battery pack and an energy storage device. The battery pack comprises a battery shell, battery cells and a partition. The battery cells are at least one and are all accommodated in the battery shell. Two ends of the battery cells are respectively provided with an electrode connecting part and an explosion-proof valve. Each battery cell is arranged in the partition. The partition is connected to the battery shell to fix the battery cells relative to the battery shell. The partition is configured to divide the battery shell into a first space and a second space. The electrode connecting part of each battery cell is located in the first space, and the explosion-proof valve of each battery cell is located in the second space. The battery pack and the energy storage device provided by the application can separate the high-temperature flue gas discharged by the explosion-proof valve from the electrical connection structure of the battery pack through a simple structure, so as to improve the space utilization rate of the battery pack.

Description

Technical Field

[0001] This application relates to the field of mobile energy storage technology, and more particularly to a battery pack and energy storage device. Background Technology

[0002] Energy storage device battery packs typically contain one or more individual battery cells. Each individual cell is equipped with an explosion-proof valve to release pressure and vent gas in the event of uncontrolled gas generation, preventing the cell from exploding. However, the high-temperature fumes emitted by the explosion-proof valves can cause short circuits and sparks in the internal electrical connections of the battery pack, potentially leading to a battery pack explosion.

[0003] In related technologies, it is necessary to fix the individual cells in the battery pack and to separate the high-temperature fumes discharged from the explosion-proof valve from the electrical connection structure of the battery pack. Different structures need to be set up in the battery pack to achieve different functions, which encroaches on the internal space of the battery pack and affects the energy storage capacity of the battery pack. Utility Model Content

[0004] In view of this, this application provides a battery pack and energy storage device that can separate the high-temperature flue gas discharged from the explosion-proof valve from the electrical connection structure of the battery pack through a simple structure, so as to improve the space utilization rate inside the battery pack.

[0005] One embodiment of this application provides a battery pack. The battery pack includes a battery casing, individual battery cells, and separators. Each individual battery cell has at least one cell and is housed within the battery casing. Each individual battery cell has an electrode connection portion and an explosion-proof valve at each of its two ends. Each individual battery cell passes through a separator. The separator is connected to the battery casing to fix the individual battery cells relative to the battery casing. The separator is configured to divide the interior of the battery casing into a first space and a second space. The electrode connection portions of each individual battery cell are located in the first space, and the explosion-proof valves of each individual battery cell are located in the second space.

[0006] The electrode connection and explosion-proof valve of the battery cell are located at opposite ends of the cell. This design facilitates the placement of a separator between the electrode connection and the explosion-proof valve, reducing the difficulty of separating these spaces and simplifying the separator's structure. Furthermore, when multiple battery cells are configured, the electrode connections and explosion-proof valves of each cell can be simultaneously separated by the same separator, reducing the number of separators required. This arrangement of the battery cell and separator allows for the separation of the explosion-proof valve and electrode connection in different spaces through a simple structural design, saving space occupied by the structure separating the explosion-proof valve and electrode connection, improving space utilization, and ultimately increasing energy storage capacity. The separator also secures the battery cell to the battery casing and performs multiple functions, simplifying the battery pack's structure, improving space utilization, and further enhancing energy storage capacity.

[0007] In some embodiments of this application, the separator is a fireproof and heat-insulating board. The fireproof and heat-insulating board has at least one mounting hole. Each mounting hole houses one battery cell.

[0008] Fire-resistant and heat-insulating panels can withstand the high-temperature fumes emitted from explosion-proof valves, thus isolating the explosion-proof valves and electrode connections in separate spaces and improving safety. Furthermore, the fire-resistant and heat-insulating panels have good structural strength, enabling stable fixation of individual battery cells and the battery casing, improving the stability of battery pack assembly.

[0009] In some embodiments of this application, the fireproof and heat-insulating board is provided with a first adhesive reservoir. The first adhesive reservoir is located on the side of the fireproof and heat-insulating board facing the electrode connection portion and / or the explosion-proof valve. Furthermore, the first adhesive reservoir is located on the outer periphery of the assembly hole, and is configured to accommodate adhesive for bonding the fireproof and heat-insulating board and the individual battery cells.

[0010] By applying adhesive to the first adhesive reservoir, the periphery of the battery cell can be bonded to the fireproof and heat-insulating board. This improves the stability of the battery cell assembly relative to the fireproof and heat-insulating board and seals the assembly holes, thus enhancing the sealing of the first and second spaces.

[0011] In some embodiments of this application, a second adhesive reservoir is provided on the wall surface surrounding the assembly hole of the fireproof and heat-insulating panel. The second adhesive reservoir extends through the side of the fireproof and heat-insulating panel facing the electrode connection portion and the side facing the explosion-proof valve. The second adhesive reservoir is configured to accommodate the adhesive for bonding the fireproof and heat-insulating panel and the individual battery cells.

[0012] By providing a second adhesive groove on the wall of the assembly hole, the gap between the periphery of the battery cell and the fireproof insulation board can be increased, making it easier to insert the battery cell into the fireproof insulation board. Furthermore, the second adhesive groove can also be filled with adhesive to bond the periphery of the battery cell to the fireproof insulation board, thereby improving the stability of the battery cell assembly relative to the fireproof insulation board and enhancing the sealing performance of the first and second spaces.

[0013] In some embodiments of this application, the fireproof and heat-insulating panel is provided with a support portion. The support portion is configured to support the battery housing such that the distance between the side of the fireproof and heat-insulating panel facing the explosion-proof valve and the wall surface of the battery housing facing that side is greater than or equal to a set distance.

[0014] The fireproof and heat-insulating plate can be fixed relative to the battery casing through the support part, which constrains the relative position of the fireproof and heat-insulating plate. This helps to avoid the second space being too small, thereby preventing the high-temperature smoke discharged into the second space by the explosion-proof valve from accumulating and exploding, and improving safety.

[0015] In some embodiments of this application, the fireproof and heat-insulating panel is provided with a first splicing portion and / or a second splicing portion. The first splicing portion of one fireproof and heat-insulating panel is configured to splice with the second splicing portion of another fireproof and heat-insulating panel, so that the two fireproof and heat-insulating panels are spliced ​​together.

[0016] The separator is formed by splicing multiple fireproof and heat-insulating boards together, which facilitates assembly. It also makes it easy to set up a group of one fireproof and heat-insulating board with one or more battery cells. According to the needs of different battery pack capacities, the appropriate number of fireproof and heat-insulating boards and battery cells can be placed, which helps to reduce the production and mold opening costs of fireproof and heat-insulating boards.

[0017] In some embodiments of this application, the separator is a fire-retardant and heat-insulating adhesive. The fire-retardant and heat-insulating adhesive is disposed around the periphery of the individual battery cell. Furthermore, the fire-retardant and heat-insulating adhesive is configured to adhere between two adjacent battery cells and between the battery cell and the battery casing.

[0018] Fire-retardant and heat-insulating adhesive can withstand the high-temperature fumes emitted by explosion-proof valves, thus isolating the explosion-proof valve and electrode connection parts in different spaces and improving safety. Furthermore, the fire-retardant and heat-insulating adhesive is flexible to apply, making it easy to apply between different battery cells and between battery cells and the battery casing, improving its applicability to different battery casings.

[0019] In some embodiments of this application, the separator includes a fireproof and heat-insulating board and a fireproof and heat-insulating adhesive. The separator has mounting holes. Multiple battery cells are inserted into the same mounting hole. The battery cells and the fireproof and heat-insulating board are fixed together by the fireproof and heat-insulating adhesive. Adjacent battery cells are fixed together by the fireproof and heat-insulating adhesive.

[0020] Fire-resistant heat-insulating boards and adhesives can withstand the high-temperature fumes emitted by explosion-proof valves, effectively isolating the explosion-proof valves and electrode connections in separate spaces to enhance safety. Furthermore, the fire-resistant heat-insulating boards possess good structural strength, stably securing the individual battery cells and battery casing, thus improving the stability of battery pack assembly. The fire-resistant heat-insulating adhesives, on the other hand, are flexible to apply, allowing for adjustments to the arrangement of the individual battery cells based on the structural adaptability of the battery casing, thereby enhancing applicability to different battery casings.

[0021] In some embodiments of this application, the battery casing and the explosion-proof valve of the individual battery cell are spaced apart. The battery casing is provided with a venting channel. The venting channel connects the portion of the second space located between the battery casing and the explosion-proof valve to the external environment of the battery casing.

[0022] By setting up an exhaust channel, the high-temperature fumes that are discharged into the second space by the explosion-proof valve can be discharged to the outside of the battery pack in a timely manner, which helps to avoid the accumulation of high-temperature fumes and explosion, and also helps to prevent high-temperature fumes from causing thermal runaway of other individual cells.

[0023] One embodiment of this application provides an energy storage device. The energy storage device includes an energy storage housing. The energy storage device also includes a battery pack as described in any of the above embodiments, the battery pack being housed within the energy storage housing.

[0024] By incorporating the aforementioned battery pack, energy storage devices can simplify the battery pack's structure, improve space utilization, and enhance energy storage capacity while separating the electrode connection section from the explosion-proof valve. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0026] Figure 1 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a battery pack provided in one embodiment of this application; Figure 3 for Figure 2 Cross-sectional view of the battery pack; Figure 4 for Figure 2 A cross-sectional view of another form of the battery pack; Figure 5 for Figure 2 A cross-sectional view of another form of the battery pack; Figure 6 A partial structural schematic diagram of a fireproof and heat-insulating panel provided in an embodiment of this application; Figure 7 This is a schematic diagram of another form of the fireproof and heat-insulating board provided in one embodiment of this application.

[0027] Explanation of main component symbols 100 - Battery pack; 200 - Energy storage device; 10-Battery casing; 11-First space; 12-Second space; 13-Exhaust channel; 20-Battery cell; 21-Electrode connection; 22-Explosion-proof valve; 30-Separator; 31-Fireproof and heat-insulating board; 32-Fireproof and heat-insulating adhesive; 311 - Assembly hole; 312 - First adhesive reservoir; 313 - Second adhesive reservoir; 314 - Support part; 315 - First splicing part; 316 - Second splicing part; 201-Energy storage shell. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] As used herein, the term "and / or" includes any and all combinations of one or more of the related listed items.

[0031] Furthermore, the terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0032] Energy storage device battery packs typically contain one or more individual battery cells. Each individual cell is equipped with an explosion-proof valve to release pressure and vent gas in the event of uncontrolled gas generation, preventing the cell from exploding. However, the high-temperature fumes emitted by the explosion-proof valves can cause short circuits and sparks in the internal electrical connections of the battery pack, potentially leading to a battery pack explosion.

[0033] In related technologies, it is necessary to fix the individual cells in the battery pack and to separate the high-temperature fumes discharged from the explosion-proof valve from the electrical connection structure of the battery pack. Different structures need to be set up in the battery pack to achieve different functions, which encroaches on the internal space of the battery pack and affects the energy storage capacity of the battery pack.

[0034] Embodiments of this application provide a battery pack. The battery pack includes a battery casing, individual battery cells, and separators. Each individual battery cell has at least one cell and is housed within the battery casing. Each individual battery cell has an electrode connection portion and an explosion-proof valve at each of its two ends. Each individual battery cell passes through a separator. The separator is connected to the battery casing to fix the individual battery cells relative to the battery casing. The separator is configured to divide the interior of the battery casing into a first space and a second space. The electrode connection portions of each individual battery cell are located in the first space, and the explosion-proof valves of each individual battery cell are located in the second space.

[0035] The electrode connection and explosion-proof valve of the battery cell are located at opposite ends of the cell. This design facilitates the placement of a separator between the electrode connection and the explosion-proof valve, reducing the difficulty of separating these spaces and simplifying the separator's structure. Furthermore, when multiple battery cells are configured, the electrode connections and explosion-proof valves of each cell can be simultaneously separated by the same separator, reducing the number of separators required. This arrangement of the battery cell and separator allows for the separation of the explosion-proof valve and electrode connection in different spaces through a simple structural design, saving space occupied by the structure separating the explosion-proof valve and electrode connection, improving space utilization, and ultimately increasing energy storage capacity. The separator also secures the battery cell to the battery casing and performs multiple functions, simplifying the battery pack's structure, improving space utilization, and further enhancing energy storage capacity.

[0036] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] See Figure 1 and Figure 2 One embodiment of this application provides a battery pack 100 and an energy storage device 200. The energy storage device 200 has the functions of storing and discharging electricity for use as backup power for homes, production units, outdoor work, and outdoor recreation, etc.; the battery pack 100 is the structure of the energy storage device 200 for storing electrical energy.

[0038] In some embodiments, the energy storage device 200 includes an energy storage housing 201 and a battery pack 100. The energy storage housing 201 is used to house the battery pack 100, and the battery pack 100 is assembled inside the energy storage housing 201. The battery pack 100 is used in the energy storage device 200, but the battery pack 100 can also be manufactured, transported, and used independently of the energy storage device 200.

[0039] In some embodiments, the energy storage device 200 further includes a power conversion module (not shown). The power conversion module is electrically connected to the battery pack 100 and is used to control the AC / DC conversion of the output current of the battery pack 100. The energy storage device 200 equipped with the power conversion module can be a small portable power supply, a residential energy storage power supply, an industrial or commercial energy storage power supply, or a containerized energy storage power supply, etc.

[0040] In some embodiments, the power conversion module may be omitted. An energy storage device 200 without a power conversion module can be used independently. An energy storage device 200 without a power conversion module typically only outputs DC power. When used independently, an energy storage device 200 without a power conversion module can be used in conjunction with an energy storage device 200 with a power conversion module as a power system providing additional battery capacity.

[0041] See Figures 3 to 5 In some embodiments, the battery pack 100 includes a battery housing 10, individual battery cells 20, and separators 30. Each individual battery cell 20 has at least one cell and is housed within the battery housing 10. Each of the two ends of the individual battery cell 20 has an electrode connection portion 21 and an explosion-proof valve 22, respectively. Each individual battery cell 20 passes through the separator 30. The separator 30 is connected to the battery housing 10 to fix the individual battery cells 20 relative to the battery housing 10. The separator 30 is configured to divide the interior of the battery housing 10 into a first space 11 and a second space 12. The electrode connection portion 21 of each individual battery cell 20 is located in the first space 11, and the explosion-proof valve 22 of each individual battery cell 20 is located in the second space 12.

[0042] The electrode connection portion 21 and the explosion-proof valve 22 of the battery cell 20 are located at opposite ends of the battery cell 20. This design facilitates the placement of the separator 30 between the electrode connection portion 21 and the explosion-proof valve 22, reducing the difficulty of separating the spaces occupied by these components and simplifying the structure of the separator 30. Furthermore, when multiple battery cells 20 are configured, the electrode connection portions 21 and explosion-proof valves 22 of each battery cell 20 can be simultaneously separated by the same separator 30, reducing the number of separators 30 required. This arrangement of the battery cell 20 and the separator 30 allows for the separation of the explosion-proof valve 22 and the electrode connection portion 21 into different spaces through a simple structural arrangement, saving space occupied by the structure separating the explosion-proof valve 22 and the electrode connection portion 21, improving space utilization, and ultimately increasing energy storage capacity. Furthermore, the separator 30 can fix the individual cell 20 and the battery casing 10 together. The separator 30 can perform multiple functions, thereby simplifying the structure of the battery pack 100, improving space utilization, and helping to increase energy storage capacity.

[0043] It is understood that in some embodiments, the battery housing 10 and the energy storage housing 201 are integrally formed, which can improve the space utilization within the energy storage device 200 and enhance the stability of the battery pack 100 within the energy storage housing 201.

[0044] See Figure 3 In some embodiments, the separator 30 is a fireproof and heat-insulating board 31. The fireproof and heat-insulating board 31 is provided with at least one mounting hole 311. Each mounting hole 311 is provided with one battery cell 20.

[0045] The fireproof and heat-insulating plate 31 can withstand the high-temperature fumes emitted by the explosion-proof valve 22, thus separating the explosion-proof valve 22 and the electrode connection part 21 into different spaces and improving safety. In addition, the fireproof and heat-insulating plate 31 has good structural strength and can stably fix the battery cell 20 and the battery casing 10, improving the assembly stability of the battery pack 100.

[0046] See Figure 3 and Figure 6 In some embodiments, the fireproof and heat-insulating plate 31 is provided with a first adhesive receiving groove 312. The first adhesive receiving groove 312 is provided on the side of the fireproof and heat-insulating plate 31 facing the electrode connection portion 21 and / or the side of the explosion-proof valve 22. The first adhesive receiving groove 312 is provided on the outer periphery of the assembly hole 311, and the first adhesive receiving groove 312 is configured to receive adhesive (not shown) for bonding the fireproof and heat-insulating plate 31 and the battery cell 20.

[0047] By providing adhesive into the first adhesive reservoir 312, the periphery of the battery cell 20 and the fireproof and heat-insulating plate 31 can be bonded together. On the one hand, this can improve the stability of the assembly of the battery cell 20 relative to the fireproof and heat-insulating plate 31, and on the other hand, it can seal the assembly hole 311, thereby improving the sealing performance of the first space 11 and the second space 12.

[0048] Understandably, in some embodiments, the surface of the fireproof and heat-insulating board 31 is recessed to form a first adhesive groove 312. The end of the mounting hole 311 that connects to the first adhesive groove 312 is flush with the bottom of the first adhesive groove 312. That is, from the surface of the fireproof and heat-insulating board 31 located on the periphery of the first adhesive groove 312 to the first adhesive groove 312 and then to the mounting hole 311, the fireproof and heat-insulating board 31 presents a stepped structure. The recessed first adhesive groove 312 may not be a complete annular groove, but may be a multi-segment groove spaced around the mounting hole 311. In other embodiments, the surface of the fireproof and heat-insulating board 31 protrudes to form an annular rib. The annular rib is arranged around the outside of the mounting hole 311, and the first adhesive groove 312 is formed between the annular rib and the mounting hole 311.

[0049] In some embodiments, the fireproof and heat-insulating plate 31 is provided with a second adhesive groove 313 around the wall surface of the mounting hole 311. The second adhesive groove 313 extends through the side of the fireproof and heat-insulating plate 31 facing the electrode connection portion 21 and the side facing the explosion-proof valve 22. The second adhesive groove 313 is configured to accommodate adhesive (not shown) for bonding the fireproof and heat-insulating plate 31 and the battery cell 20.

[0050] By providing a second adhesive groove 313 on the wall of the assembly hole 311, the gap between the periphery of the battery cell 20 and the fireproof and heat-insulating plate 31 can be increased, making it easier to insert the battery cell 20 into the fireproof and heat-insulating plate 31. Furthermore, the second adhesive groove 313 can also be provided with adhesive to bond the periphery of the battery cell 20 to the fireproof and heat-insulating plate 31, thereby improving the stability of the assembly of the battery cell 20 relative to the fireproof and heat-insulating plate 31 and enhancing the sealing performance of the first space 11 and the second space 12.

[0051] Understandably, in some embodiments, the first adhesive container 312 and the second adhesive container 313 are connected, so that the adhesive poured into the first adhesive container 312 can flow into the second adhesive container 313. This facilitates the filling of the second adhesive container 313 with adhesive and also helps to prevent the adhesive from overflowing from the first adhesive container 312.

[0052] It is understood that in some embodiments, multiple second adhesive reservoirs 313 are provided, and the multiple second adhesive reservoirs 313 are spaced apart around the wall of the assembly hole 311, so as to reduce the difficulty of inserting the battery cell 20 into the fireproof and heat-insulating plate 31.

[0053] See Figure 3 and Figure 5 In some embodiments, the fireproof heat insulation board 31 is provided with a support portion 314. The support portion 314 is configured to support the battery housing 10 such that the distance between the side of the fireproof heat insulation board 31 facing the explosion-proof valve 22 and the wall surface of the battery housing 10 facing that side is greater than or equal to a set distance.

[0054] The fireproof and heat-insulating plate 31 can be fixed relative to the battery casing 10 through the support part 314, which constrains the relative position of the fireproof and heat-insulating plate 31. This helps to prevent the second space 12 from being too small, thereby helping to prevent the high-temperature smoke discharged into the second space 12 by the explosion-proof valve 22 from accumulating and exploding, thus improving safety.

[0055] The set distance is adaptively adjusted according to the size of the battery casing 10 and the size of the individual battery cell 20, so as to ensure that the high-temperature fumes discharged by the explosion-proof valve 22 will not accumulate and explode in the second space 12.

[0056] See Figure 3 , Figure 5 and Figure 7 In some embodiments, the fireproof and heat-insulating board 31 is provided with a first splicing portion 315 and / or a second splicing portion 316. The first splicing portion 315 of one fireproof and heat-insulating board 31 is configured to splice with the second splicing portion 316 of another fireproof and heat-insulating board 31 so that the two fireproof and heat-insulating boards 31 are spliced ​​together.

[0057] The separator 30 is formed by splicing together multiple fireproof and heat-insulating boards 31, which facilitates assembly; and it is also convenient to set up a group of one fireproof and heat-insulating board 31 with one or more battery cells 20. According to the needs of different battery pack 100 capacity sizes, the corresponding number of fireproof and heat-insulating boards 31 and battery cells 20 can be placed, which helps to reduce the production and mold opening cost of the fireproof and heat-insulating board 31.

[0058] It is understood that in some embodiments, when multiple fireproof and heat-insulating panels 31 are spliced ​​together, the fireproof and heat-insulating panels 31 located on the periphery are directly connected and fixed to the battery housing 10, while the fireproof and heat-insulating panels 31 located in the middle and not in direct contact with the battery housing 10 are indirectly connected and fixed to the battery housing 10 through other fireproof and heat-insulating panels 31.

[0059] See Figure 4 In some embodiments, the separator 30 is a fire-retardant and heat-insulating adhesive 32. The fire-retardant and heat-insulating adhesive 32 is disposed around the periphery of the battery cell 20. The fire-retardant and heat-insulating adhesive 32 is configured to adhere between two adjacent battery cells 20 and between the battery cell 20 and the battery casing 10.

[0060] The fire-retardant and heat-insulating adhesive 32 can withstand the high-temperature fumes emitted by the explosion-proof valve 22, thus separating the explosion-proof valve 22 and the electrode connection part 21 into different spaces and improving safety. Furthermore, the fire-retardant and heat-insulating adhesive 32 is flexible to apply, making it easy to apply between different battery cells 20 and between the battery cells 20 and the battery casing 10, improving its applicability to different battery casings 10.

[0061] See Figure 5 In some embodiments, the separator 30 includes a fireproof and heat-insulating plate 31 and a fireproof and heat-insulating adhesive 32. The separator 30 is provided with an assembly hole 311. Multiple battery cells 20 are inserted into the same assembly hole 311. The battery cells 20 and the fireproof and heat-insulating plate 31 are fixed together by the fireproof and heat-insulating adhesive 32. Adjacent battery cells 20 are fixed together by the fireproof and heat-insulating adhesive 32.

[0062] The fireproof heat insulation board 31 and the fireproof heat insulation adhesive 32 can withstand the high-temperature fumes emitted by the explosion-proof valve 22, thus separating the explosion-proof valve 22 and the electrode connection part 21 into different spaces and improving safety. Furthermore, the fireproof heat insulation board 31 has good structural strength, which can stably fix the battery cell 20 and the battery casing 10, improving the assembly stability of the battery pack 100; while the fireproof heat insulation adhesive 32 is flexible to apply, making it easy to adjust the arrangement of the battery cell 20 according to the structural adaptability of the battery casing 10, improving its applicability to different battery casings 10.

[0063] See Figure 4 and Figure 5 In some embodiments, the fireproof and heat-insulating adhesive 32 is a foam adhesive, which is used to fix the battery cell 20 at the injection position around the battery cell 20 and helps to prevent the fireproof and heat-insulating adhesive 32 from flowing around.

[0064] See Figure 3 and Figure 5In some embodiments, the fireproof heat insulation board 31 and the battery housing 10 are fixed together by fasteners such as bolts, facilitating the removal of the fireproof heat insulation board 31. In other embodiments, the fireproof heat insulation board 31 and the battery housing 10 can be bonded together with adhesive, facilitating the assembly of the fireproof heat insulation board 31 to the battery housing 10; or, the fireproof heat insulation board 31 and the battery housing 10 can be an integrally formed structure, eliminating the assembly steps of the fireproof heat insulation board 31 and the battery housing 10.

[0065] See Figures 3 to 5 In some embodiments, the battery housing 10 and the explosion-proof valve 22 of the battery cell 20 are spaced apart. The battery housing 10 is provided with an exhaust channel 13. The exhaust channel 13 connects the portion of the second space 12 located between the battery housing 10 and the explosion-proof valve 22 with the external environment of the battery housing 10.

[0066] By setting up the exhaust channel 13, the high-temperature flue gas discharged into the second space 12 by the explosion-proof valve 22 can be discharged to the outside of the battery pack 100 in a timely manner, which helps to avoid the accumulation and explosion of high-temperature flue gas, and also helps to prevent the high-temperature flue gas from causing thermal runaway of other battery cells 20.

[0067] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A battery pack, characterized in that, The battery pack includes: Battery casing; A single battery cell, having at least one and all housed within the battery casing, wherein each of the two ends of the single battery cell is provided with an electrode connection portion and an explosion-proof valve; A separator is provided, and each of the battery cells passes through the separator. The separator is connected to the battery housing to fix the battery cells relative to the battery housing. The separator is configured to divide the interior of the battery housing into a first space and a second space. The electrode connection portion of each of the battery cells is located in the first space, and the explosion-proof valve of each of the battery cells is located in the second space.

2. The battery pack according to claim 1, characterized in that, The separator is a fireproof and heat-insulating board, and the fireproof and heat-insulating board has at least one assembly hole, with one battery cell in each assembly hole.

3. The battery pack according to claim 2, characterized in that, The fireproof and heat-insulating board is provided with a first adhesive groove, which is located on the side of the fireproof and heat-insulating board facing the electrode connection part and / or the side of the explosion-proof valve, and is located on the outer periphery of the assembly hole. The first adhesive groove is configured to accommodate adhesive for bonding the fireproof and heat-insulating board and the battery cell.

4. The battery pack according to claim 2 or 3, characterized in that, The fireproof and heat-insulating board has a second adhesive groove on the wall surface around the assembly hole. The second adhesive groove extends through the side of the fireproof and heat-insulating board facing the electrode connection part and the side of the explosion-proof valve. The second adhesive groove is configured to accommodate the adhesive for bonding the fireproof and heat-insulating board and the battery cell.

5. The battery pack according to claim 2, characterized in that, The fireproof and heat-insulating plate is provided with a support portion, which is configured to support the battery housing, such that the distance between the side of the fireproof and heat-insulating plate facing the explosion-proof valve and the wall of the battery housing facing that side is greater than or equal to a set distance.

6. The battery pack according to claim 2, characterized in that, The fireproof and heat-insulating board is provided with a first splicing part and / or a second splicing part. The first splicing part of one fireproof and heat-insulating board is configured to be spliced ​​with the second splicing part of another fireproof and heat-insulating board, so that the two fireproof and heat-insulating boards can be spliced ​​together.

7. The battery pack according to claim 1, characterized in that, The separator is a fire-retardant and heat-insulating adhesive, which is arranged around the periphery of the battery cell and is bonded between two adjacent battery cells and between the battery cell and the battery casing.

8. The battery pack according to claim 1, characterized in that, The separator includes a fireproof and heat-insulating board and a fireproof and heat-insulating adhesive. The separator is provided with an assembly hole, and multiple battery cells are inserted into the same assembly hole. The fireproof and heat-insulating adhesive is arranged around the periphery of the battery cell and is bonded between two adjacent battery cells and between the battery cell and the fireproof and heat-insulating board.

9. The battery pack according to claim 8, characterized in that, The battery casing and the explosion-proof valve of the battery cell are spaced apart. The battery casing is provided with an exhaust channel, which connects the portion of the second space located between the battery casing and the explosion-proof valve with the external environment of the battery casing.

10. An energy storage device, comprising an energy storage housing, characterized in that, The energy storage device further includes a battery pack as described in any one of claims 1 to 9, the battery pack being disposed within the energy storage housing.

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