Shell assembly and energy storage equipment

Abstract

The utility model provides a shell assembly and energy storage equipment, and the shell assembly comprises a first shell which is provided with a first accommodating cavity which is configured to accommodate a battery cell assembly; the second shell is fixed to one end of the first shell, a second containing cavity is defined between the second shell and the first shell, and the second containing cavity is configured to contain the circuit board assembly; a pressure relief hole is formed in one end, close to the second shell, of the first shell, and the pressure relief hole is communicated with the first accommodating cavity; an exhaust port is formed in the first shell and / or the second shell, and the exhaust port is communicated with the second accommodating cavity; the pressure relief hole is configured to be assembled with the pressure relief valve, and when the temperature in the first containing cavity rises, gas in the first containing cavity is exhausted out of the second shell through the pressure relief valve and the exhaust port. The pressure relief hole can be prevented from being independently formed in one side of the shell assembly, meanwhile, the pressure relief hole is hidden in the second shell, the space utilization rate is increased, and the appearance integrity of the shell assembly can be protected.

Description

Technical Field

[0001] This application relates to the technical field of energy storage devices, and particularly to a housing assembly and an energy storage device. Background Technology

[0002] Currently, mobile energy storage devices typically consist of a housing, battery cells, and circuit board assemblies, with the battery cells and circuit board assemblies fixed within the housing. The housing is equipped with a pressure relief valve, which releases pressure when the gas inside the housing expands due to internal heating, allowing some of the gas to escape from the housing. However, sufficient space must be provided between the housing and the battery cells to accommodate the circuit board assemblies, while the distance between the pressure relief valve and the battery cells needs to be minimized to ensure efficient gas release. Therefore, optimizing the spatial layout of the housing while ensuring the functionality of the pressure relief valve is a critical technical challenge that needs to be addressed. Utility Model Content

[0003] In view of the above, it is necessary to provide a housing component and energy storage device that can reduce assembly difficulty and improve space utilization.

[0004] This application provides a housing assembly for use in an energy storage device, the energy storage device including a battery cell assembly and a circuit board assembly. The housing assembly includes: a first housing having a first receiving cavity configured to receive the battery cell assembly; a second housing fixed to one end of the first housing, the second housing and the first housing enclosing each other to form a second receiving cavity configured to receive the circuit board assembly; wherein, a pressure relief hole is provided at one end of the first housing near the second housing, the pressure relief hole communicating with the first receiving cavity; the first housing and / or the second housing are provided with an exhaust port, the exhaust port communicating with the second receiving cavity; the pressure relief hole is configured for mounting a pressure relief valve, and when the temperature rises in the first receiving cavity, the gas in the first receiving cavity is discharged to the outside of the second housing through the pressure relief valve and the exhaust port.

[0005] In some embodiments, a partition is provided inside the first housing, and a first receiving cavity is formed between the first side of the partition and the first housing, and a second receiving cavity is formed between the second side of the partition and the second housing; a pressure relief hole is opened in the partition and penetrates through the first and second sides.

[0006] In some embodiments, the first receiving cavity is configured to receive an inverted battery cell assembly, and a slot is provided on the first side, the slot being configured to allow the ends of each battery cell of the battery cell assembly to be inserted.

[0007] In some embodiments, a gap is formed between one end of the first housing near the second housing and the second surface to form a enclosure wall, and the enclosure wall, the partition, and the second housing enclose a second receiving cavity.

[0008] In some embodiments, the energy storage device further includes functional components; the second housing includes a top plate and side plates disposed circumferentially along the top plate, the top plate being disposed opposite to a partition, the side plates being abutted against a wall, and the top plate being configured to assemble functional components.

[0009] In some embodiments, the vent is provided in the enclosure and / or side panel.

[0010] In some embodiments, a wiring port is provided at the junction of the first housing and the second housing, the wiring port being configured to expose the second receiving cavity; the wiring port and the vent are distributed on different sides of the housing assembly; the housing assembly also includes a cover that covers the wiring port and is detachably connected to the first housing and / or the second housing.

[0011] In some embodiments, a handle is provided at the junction of the first housing and the second housing, the wiring port and the handle are distributed on opposite sides of the housing assembly, and the vent is opened at the part of the housing assembly between the handle and the wiring port.

[0012] In some embodiments, the housing assembly further includes a pressure relief valve disposed in a pressure relief port, the pressure relief valve being one or more of a waterproof and breathable membrane, an elastic valve, and a metal valve.

[0013] The second aspect of this application provides an energy storage device, which includes a battery cell assembly, a circuit board assembly, and a housing assembly as described in the first aspect. The battery cell assembly is housed and confined within a first receiving cavity of the housing assembly, and the circuit board assembly is housed within a second receiving cavity of the housing assembly.

[0014] With the housing assembly and energy storage device provided in this application, both the circuit board assembly and the pressure relief hole are located at one end of the first housing near the second housing, avoiding obstruction of gas flow between the pressure relief hole and the battery cell assembly by the position of the circuit board assembly. Thus, when the gas expands due to heating in the first housing cavity, the gas in the first housing cavity directly enters the second housing cavity via the pressure relief valve and is discharged to the outside of the second housing through the exhaust port, reducing the interference of the circuit board assembly on gas flow, improving pressure relief efficiency, and ensuring the realization of the pressure relief function. Furthermore, the concentrated arrangement of the circuit board assembly and the pressure relief hole at one end of the first housing near the second housing avoids the pressure relief hole being located separately on one side of the housing assembly, while concealing the pressure relief hole within the second housing, not only improving space utilization but also protecting the appearance integrity of the housing assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 A schematic cross-sectional view of the energy storage device along line AA.

[0017] Figure 3 This is an exploded view of an energy storage device provided in an embodiment of this application.

[0018] Figure 4 This is an exploded view of the first housing and pressure relief valve provided in an embodiment of this application.

[0019] Figure 5 This is a schematic diagram of the structure of the first housing provided in an embodiment of this application.

[0020] Figure 6 This is a cross-sectional schematic diagram of a pressure relief valve and a first housing provided in an embodiment of this application.

[0021] Figure 7 This is a cross-sectional schematic diagram of a pressure relief valve and a first housing provided for another embodiment of this application.

[0022] Figure 8 for Figure 7 A magnified view of a section at point B in the middle.

[0023] Figure 9 An exploded view of a first housing, a second housing, and a cover provided in an embodiment of this application.

[0024] Explanation of main component symbols

[0025] 100. Housing assembly; 101. Exhaust port; 102. Wiring port; 103. Handle;

[0026] 10. First housing; 11. First receiving cavity; 111. Cavity opening; 12. Slot; 13. Partition; 131. Limiting member; 132. First surface; 133. Second surface; 134. Pressure relief hole; 14. First connecting post; 15. First fixing post; 16. Enclosure; 17. First assembly post; 18. First opening; 19. First handle;

[0027] 20. Second housing; 21. Second receiving cavity; 22. Top plate; 23. Side plate; 24. Second mounting post; 25. Second opening; 26. Second handle;

[0028] 30. Bottom shell; 31. Sealing ring; 32. Second fixing post; 33. Protruding post; 34. Baffle;

[0029] 40. Fixed bracket; 41. Second connecting column;

[0030] 50. Covering component; 51. Connecting pipe;

[0031] 60. Pressure relief valve; 60X. Waterproof and breathable membrane; 60Y. Flexible valve; 61. Valve cover; 62. Fixing post;

[0032] 200. Battery cell assembly; 201. Battery cell;

[0033] 300. Circuit board assembly; 301. First circuit board; 302. Second circuit board;

[0034] 400. Functional components;

[0035] 1000. Energy storage equipment. Detailed Implementation

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. The directional descriptions used in this application, such as "horizontal," "vertical," "up," and "down," all use the direction of the product in its usage state as a reference. The specific orientation may vary depending on the product's placement angle (such as horizontal or vertical placement), and this application does not impose any limitations on this.

[0037] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have a component that is centrally located. When a component is considered to be "set" on another component, it can be directly set on the other component or may also have a component that is centrally located.

[0038] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] 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 to which this application belongs. The terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms “comprising” and “equivalent to”, and any variations thereof, in the specification, claims, and foregoing description of the drawings, are intended to cover non-exclusive inclusion.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In related technologies, energy storage devices typically include a casing, a battery pack, and functional circuit boards. The battery pack includes cell assemblies, a protective casing, and a battery management board. Each cell assembly consists of multiple cylindrical cells, which are enclosed by the protective casing. The battery management board is fixed to the protective casing and electrically connected to the cell assembly. The cells within the cell assembly are arranged in an array, with all cells facing the same direction. The battery management board is located at the head of each cell. The energy storage device also includes a pressure relief valve, which releases pressure when the gas inside the casing expands due to internal heating, allowing some of the gas to escape from the casing.

[0042] Currently, the outer shell of energy storage devices is designed around a protective shell. For example, the protective shell design is the core of the product, and functional circuit boards are set on the front and back sides of the protective shell. The shell is divided into front and back panels, middle frame and top cover, and the protective shell is wrapped by the combination of front and back panels, middle frame and top cover.

[0043] However, the presence of the protective shell increases the distance between the battery cell assembly and the outer shell. In addition, the distance between the outer shell and the battery cell assembly needs to allow sufficient space for the circuit board assembly, resulting in a large space requirement. However, the distance between the pressure relief valve and the battery cell assembly needs to be shortened to ensure venting efficiency. The large space will affect the pressure relief venting efficiency. Therefore, there is a technical contradiction between the two. How to optimize the space layout of the outer shell while ensuring the venting function of the pressure relief valve is an urgent technical problem to be solved.

[0044] On the other hand, there is also a CTC (Cell to Chassis) battery pack in the existing technology. This battery pack eliminates the design of the protective shell, and the cell assembly can be directly fixed inside the shell, with the pressure relief valve installed in the shell. Although this can solve the space utilization problem to some extent, in order to reduce the obstruction of the pressure relief air path by the circuit board assembly, the circuit board assembly cannot be designed between the pressure relief valve and the cell assembly, which means that the circuit board assembly and the pressure relief valve usually need to be installed on different sides of the shell.

[0045] For example, placing the circuit board assembly on the top surface of the housing and the pressure relief valve on the side of the housing requires that space be reserved in different parts of the housing for the circuit board assembly and the pressure relief valve respectively. The space utilization still needs to be improved, and the pressure relief valve placed separately on one side of the housing will damage the appearance integrity of the housing and affect the user experience.

[0046] Therefore, embodiments of this application provide a housing assembly and an energy storage device, which have the characteristics of optimizing the internal spatial layout of the structure and improving space utilization.

[0047] Figure 1 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application. Figure 2 for Figure 1 A schematic cross-sectional view of the energy storage device along line AA.

[0048] like Figure 1 and Figure 2 As shown, this application embodiment first provides a housing assembly 100, which can be applied to an energy storage device 1000, such as a portable outdoor power supply, a home emergency power supply, or a desktop UPS (Uninterruptible Power Supply). The energy storage device 1000 includes a battery cell assembly 200, a circuit board assembly 300, and the housing assembly 100. Both the battery cell assembly 200 and the circuit board assembly 300 are housed within the housing assembly 100.

[0049] In the example of this application, the cell assembly 200 has a plurality of cylindrical cells 201, and each cell 201 has a head end and an end end.

[0050] In the example of this application, the circuit board assembly 300 includes a first circuit board 301 and a second circuit board 302, wherein the first circuit board 301 and the second circuit board 302 are electrically connected. The first circuit board 301 can be a PSDR board (inverter control board), and the second circuit board 302 can be a PD board, SKT board, or other circuit board configured with an interface.

[0051] In the example of this application, the energy storage device 1000 also includes a functional component 400, which is mounted on the housing assembly 100 and electrically connected to the second circuit board 302. The functional component 400 can be a power interface, a data interface, or other functional interfaces, or it can be an interactive button, indicator light, display screen, etc.

[0052] In the example of this application, the energy storage device 1000 may further include a third circuit board (not shown in the figure), which is fixed inside the housing assembly 100 and electrically connected to the cell assembly 200 and the first circuit board 301. Specifically, the third circuit board may be a BMS board (battery management board), with the head end of the cell assembly 200 facing the third circuit board and electrically connected to it.

[0053] Figure 3 This is an exploded view of an energy storage device provided in an embodiment of this application. Figure 4 This is an exploded view of the first housing and pressure relief valve provided in an embodiment of this application.

[0054] Please refer to the following: Figure 3 and Figure 4 In this embodiment, the housing assembly 100 includes a first housing 10, a second housing 20, and a pressure relief valve 60, wherein the first housing 10 and the second housing 20 together constitute the main body of the housing assembly 100. The first housing 10 has a first receiving cavity 11, which is configured to receive an inverted battery cell assembly 200. The second housing 20 is fixed to one end of the first housing 10, and the second housing 20 and the first housing 10 enclose a second receiving cavity 21, which is configured to receive a circuit board assembly 300.

[0055] A pressure relief hole 134 is provided at one end of the first housing 10 near the second housing 20, and the pressure relief hole 134 is connected to the first receiving cavity 11. A pressure relief valve 60 is provided at the pressure relief hole 134. The first housing 10 and / or the second housing 20 are provided with an exhaust port 101, which is connected to the second receiving cavity 21. When the temperature rises in the first receiving cavity 11, the gas in the first receiving cavity 11 is discharged to the outside of the second housing 20 through the pressure relief valve 60 and the exhaust port 101.

[0056] It is worth noting that the inverted state of the cell assembly 200 refers to the state in which the end of the cell assembly 200 faces upward when the product is in normal use (such as when the housing assembly 100 is placed vertically). That is, the end of the cell assembly 200, the head of the cell assembly 200, and the third circuit board are arranged sequentially from top to bottom. Unlike the prior art design where the cell end faces downward (i.e., the upright state), the inverted cell assembly 200 in this application adopts a design where the head faces downward.

[0057] The housing assembly 100 provided in this application forms a first receiving cavity 11 and a second receiving cavity 21 between the first housing 10, the second housing 20, and the bottom housing 30. The first receiving cavity 11 and the second receiving cavity 21 respectively house the battery cell assembly 200 and the circuit board assembly 300. A pressure relief hole 134 is provided between the first receiving cavity 11 and the second receiving cavity 21. Since the protective shell design is eliminated, more space can be left for the circuit board assembly 300, thereby improving space utilization.

[0058] Meanwhile, both the circuit board assembly 300 and the pressure relief hole 134 are located at the end of the first housing 10 closest to the second housing 20, preventing the circuit board assembly 300 from obstructing gas flow between the pressure relief hole 134 and the battery cell assembly 200. Thus, when the gas expands due to heating in the first receiving cavity 11, the gas in the first receiving cavity 11 directly enters the second receiving cavity 21 via the pressure relief valve 60 and is discharged to the outside of the second housing 20 through the exhaust port 101. This reduces the interference of the circuit board assembly 300 on gas flow, improves pressure relief efficiency, and ensures the realization of the pressure relief function.

[0059] Furthermore, the circuit board assembly 300 and the pressure relief hole 134 are concentrated at one end of the first housing 10 near the second housing 20, which avoids the pressure relief hole 134 being set separately on one side of the housing assembly 100. At the same time, the pressure relief hole 134 is hidden inside the second housing 20, which not only improves space utilization but also protects the appearance integrity of the housing assembly 100.

[0060] In some embodiments, the energy storage device 1000 further includes a bottom shell 30, which is disposed at the end of the first shell 10 away from the second shell 20. A first receiving cavity 11 extends through the end of the first shell 10 away from the second shell 20, forming an opening 111. The bottom shell 30 covers the opening 111 and secures the battery cell assembly 200 within the first receiving cavity 11. The bottom shell 30 is also provided with a sealing ring 31, forming a sealed connection between the bottom shell 30 and the first shell 10. Thus, the first receiving cavity 11 forms a sealed cavity relative to the outside of the first shell 10, improving waterproofing and reducing interference from water in the external environment on the battery structure.

[0061] In some embodiments, the first housing 10 is internally hollow, and the cross-section of the first housing 10 in the horizontal direction is generally rectangular, so that the first housing 10 can be arranged longitudinally (e.g., Figure 2 (as shown) or horizontal (as shown) Figure 1 Place it on a fixed object in the manner shown in the figure.

[0062] Figure 5 This is a schematic diagram of the structure of the first housing provided in an embodiment of this application.

[0063] Please refer to the following: Figure 5 In some embodiments, a partition 13 is provided inside the first housing 10. The partition 13 has a first surface 132 and a second surface 133 disposed opposite to each other. The first surface 132 of the partition 13 faces the bottom housing 30, and the second surface 133 of the partition 13 faces the second housing 20. The first surface 132 of the partition 13 and the first housing 10 enclose a first receiving cavity 11, and the partition 13 forms the bottom of the first receiving cavity 11.

[0064] A pressure relief hole 134 is formed in the partition 13 and extends through the first surface 132 and the second surface 133. The pressure relief hole 134 is located in the part of the partition 13 close to the exhaust port 101 to shorten the distance between the pressure relief hole 134 and the exhaust port 101 and accelerate the pressure relief efficiency.

[0065] Figure 6 This is a cross-sectional schematic diagram of a pressure relief valve and a first housing provided in an embodiment of this application. Figure 7 This is a cross-sectional schematic diagram of a pressure relief valve and a first housing provided for another embodiment of this application.

[0066] Please refer to the following: Figure 6 and Figure 7 The shape and number of pressure relief holes 134 can also be configured according to the type of pressure relief valve 60, wherein the pressure relief valve 60 can be one or more of waterproof and breathable membrane 60X, elastic valve 60Y, and metal valve.

[0067] In this embodiment, taking the pressure relief valve 60 as an example, the pressure relief hole 134 can be a single large through hole or multiple small through holes spaced apart. The waterproof and breathable membrane 60X covers all the pressure relief holes 134. When the gas expands due to the increased temperature in the first receiving cavity 11, the gas can pass through the pressure relief hole 134 and the waterproof and breathable membrane 60X into the second receiving cavity 21. At the same time, the waterproof and breathable membrane 60X can also prevent moisture from passing through the pressure relief hole 134, ensuring the sealing of the first receiving cavity 11.

[0068] Figure 8 for Figure 7 A magnified view of a section at point B in the middle.

[0069] Please refer to the following: Figure 8In other embodiments, the pressure relief valve 60 can also be of other types. Taking the pressure relief valve 60 as an example of an elastic valve 60Y, the elastic valve 60Y can be a silicone valve. The elastic valve 60Y has a valve cover 61 and a fixing post 62. There are multiple pressure relief holes 134, which are respectively a first pressure relief hole 134A and a second pressure relief hole 134B. There are multiple second pressure relief holes 134B, which are distributed circumferentially around the first pressure relief hole 134A. The fixing post 62 is snapped and fixed to the first pressure relief hole 134A. The valve cover 61 covers each of the second pressure relief holes 134B. Under normal circumstances, the valve cover 61 seals each of the second pressure relief holes 134B to prevent gas or moisture from passing through the second pressure relief holes 134B, thus ensuring the sealing of the first receiving cavity 11. When the gas expands due to the increased temperature in the first receiving cavity 11, the gas can open the valve cover 61 through the second pressure relief hole 134B. The valve cover 61 undergoes elastic deformation, allowing the gas to enter the second receiving cavity 21 through the second pressure relief hole 134B.

[0070] In the example of this application, the number of pressure relief holes 134 is 1. In other embodiments, the number of pressure relief holes 134 may be greater than 1, and multiple pressure relief holes 134 may be distributed at different positions on the partition 13, and different types of pressure relief valves 60 may be provided. The specific configuration can be made according to the pressure relief efficiency requirements, and this application does not impose any restrictions on this.

[0071] In some embodiments, the first surface 132 is provided with a slot 12, which is configured to allow the end of each cell 201 in the power supply cell assembly 200 to be inserted to limit the cell 201. A pressure relief hole 134 is provided on the partition 13 at a location where the slot 12 is not provided.

[0072] For example, the middle portion of the second surface 133 protrudes towards the second housing 20 to form an annular retaining member 131 on the first surface 132, and a slot 12 is formed inside the retaining member 131. A pressure relief hole 134 is formed on the portion of the partition 13 that does not protrude to form the retaining member 131.

[0073] The inner diameter of the limiting member 131 corresponds to the diameter of the battery cell 201. Each battery cell 201 in the battery cell assembly 200 can be inserted into multiple limiting members 131 in a one-to-one correspondence. When the end of the battery cell 201 is inserted into the limiting member 131, the groove wall of the slot 12 is close to the periphery of the battery cell 201 to constrain the end of the battery cell 201 and achieve a positioning effect.

[0074] It is understood that the first housing 10, through the slot 12, can limit the battery cell assembly 200 at the bottom of the first receiving cavity 11, and, together with the bottom housing 30, fix the battery cell assembly 200. This replaces the design of a protective shell, simplifies the assembly structure of the battery cell assembly 200, reduces the assembly difficulty of the battery cell assembly 200, and improves production efficiency. Furthermore, it reduces the space occupied by the protective shell, improves space utilization, and thus reduces the overall size of the product, making it easier to carry and improving the user experience.

[0075] On the other hand, since the pressure relief hole 134 is provided on the partition 13 and the pressure relief hole 134 is located on the partition 13 in a part that does not protrude toward the second housing 20, the distance between the pressure relief hole 134 and the battery cell 201 can be shortened. When the battery cell 201 heats up and causes gas expansion in the first receiving cavity 11, the gas around the battery cell 201 can be quickly discharged to the pressure relief hole 134, thereby improving the pressure relief and exhaust efficiency.

[0076] In some embodiments, a first connecting post 14 is provided on the first surface 132. The first connecting post 14 extends along the length direction of the cell 201 toward the cavity opening 111 and is configured to cooperate with the fixing bracket 40 for installation. For example, the first connecting post 14 is hollow inside and is integrally formed with the partition 13. There are multiple first connecting posts 14, and the multiple first connecting posts 14 are distributed adjacent to the areas where the respective limiting members 131 are located.

[0077] The fixing bracket 40 is used in conjunction with the battery cell assembly 200. The fixing bracket 40 is fixed within the first receiving cavity 11 and configured to constrain the end of the battery cell 201 away from the limiting member 131. For example, the fixing bracket 40 has multiple fixing slots on the side facing the partition 13, into which the end of the battery cell 201 away from the limiting member 131 is inserted to constrain the head end of the battery cell 201. The bottom shell 30 fixes the fixing bracket 40 to cooperate with the limiting member 131 in limiting both ends of the battery cell 201, thereby improving the installation stability of the battery cell 201.

[0078] In some embodiments, the fixing bracket 40 is provided with a second connecting post 41, which is used to mate with the first connecting post 14 and is fixedly connected to the first connecting post 14 by a fastener. For example, the second connecting post 41 is hollow inside and extends along the length of the cell 201 toward the first connecting post 14. There are multiple second connecting posts 41, and the positions of the multiple second connecting posts 41 correspond to the positions of the multiple first connecting posts 14. The fastener can be a fixing screw, which passes through the second connecting post 41 and is threadedly connected to the first connecting post 14, thereby achieving a fixed connection between the fixing bracket 40 and the partition 13.

[0079] In some embodiments, a first fixing post 15 is provided on the first surface 132. The first fixing post 15 extends toward the cavity opening 111, and the extension length of the first fixing post 15 is greater than the extension length of the first connecting post 14. The first fixing post 15 is used for assembly with the bottom shell 30. Exemplarily, the first fixing post 15 is integrally formed with the partition plate 13, and there are multiple first fixing posts 15, which are distributed along the inner wall of the first shell 10.

[0080] In some embodiments, the partition 13 is further provided with a pressure relief hole 134, which penetrates the partition 13 to connect the first receiving cavity 11 and the second receiving cavity 21. The pressure relief hole 134 is provided for the pressure relief valve 60, which is used to allow the gas in the first receiving cavity 11 to be discharged to the second receiving cavity 21 when the gas expands due to the increase in temperature inside the first receiving cavity 11, so as to achieve the effect of pressure relief and explosion prevention.

[0081] In some embodiments, the bottom shell 30 has a second fixing post 32 on the side facing the first receiving cavity 11 for docking with the first fixing post 15. The second fixing post 32 and the first fixing post 15 are fixedly connected by a fastener. For example, the second fixing post 32 is hollow inside and extends along the length of the battery cell 201 toward the first fixing post 15. There are multiple second fixing posts 32, and the positions of the multiple second fixing posts 32 correspond to the positions of the multiple first fixing posts 15. The fastener can be a fixing screw, which passes through the second fixing post 32 and is threadedly connected to the first fixing post 15, thus achieving a fixed connection between the bottom shell 30 and the first housing 10.

[0082] In some embodiments, a protruding post 33 is provided on the side of the bottom shell 30 facing the fixed bracket 40, and the protruding post 33 is fixedly connected to the fixed bracket 40 post by a fastener. For example, the protruding post 33 is hollow inside, protruding from the center of the bottom shell 30, and there are multiple protruding posts 33 spaced apart. The fastener can be a fixing screw, which passes through the protruding post 33 and is threadedly connected to the fixed bracket 40, thereby achieving a fixed connection between the fixed bracket 40 and the bottom shell 30.

[0083] It is understood that the side of the fixed bracket 40 facing the partition 13 is fixed to the first connecting post 14, and the other side of the fixed bracket 40 is fixed to the housing, thereby improving the installation stability of the fixed bracket 40 and thus enhancing the stability of the battery cell assembly 200.

[0084] In some embodiments, a baffle 34 is provided on the side of the bottom shell 30 facing the fixed bracket 40, and the baffle 34 has a plurality of through holes corresponding to the protrusions 33. The protrusions 33 pass through the through holes and are fixedly connected to the fixed bracket 40.

[0085] In some embodiments, the bottom shell 30 is further configured to accommodate a third circuit board, which is disposed between the battery cell assembly 200 and the bottom shell 30. The third circuit board is electrically connected to the head end of the battery cell assembly 200, and is electrically connected to the first circuit board 301 via a wire. The partition 13 has a through hole for the power supply wire to pass through, and the through hole is sealed with sealant after the wire passes through, thereby ensuring the airtightness of the first receiving cavity 11 while maintaining an electrical connection between the third circuit board and the first circuit board 301.

[0086] In some embodiments, a gap is formed between the end of the first housing 10 away from the cavity 111 and the second surface 133 of the partition 13 to form a surrounding wall 16. The surrounding wall 16, the partition 13, and the second housing 20 enclose each other to form a second receiving cavity 21. The first circuit board 301 is fixed to the second surface 133.

[0087] The enclosure 16 extends from the second side 133 of the partition 13 toward the direction of approaching the second housing 20 and surrounds the partition 13 circumferentially to shield and protect the first circuit board 301, while also serving to dock with the second housing 20.

[0088] Figure 9 An exploded view of a first housing, a second housing, and a cover provided in an embodiment of this application.

[0089] Please refer to the following: Figure 9 In some embodiments, the second housing 20 includes a top plate 22 and a side plate 23 disposed circumferentially along the top plate 22. The top plate 22 is disposed opposite to the partition 13, and the side plate 23 is abutted against the enclosure wall 16. Exemplarily, the top plate 22 and the side plate 23 are integrally formed, with the top plate 22 and the partition 13 disposed opposite to each other, and the side plate 23 disposed circumferentially along the enclosure wall 16. Thus, the top plate 22, the partition 13, the enclosure wall 16, and the side plate 23 enclose and form a second receiving cavity 21.

[0090] In some embodiments, the first circuit board 301 is bolted to the second surface 133, the second circuit board 302 is bolted to the top plate 22, and the functional component 400 is embedded and fixed to the top plate 22. Thus, the first circuit board 301 and the second circuit board 302 are respectively fixed to the partition 13 and the top plate 22, allowing the first circuit board 301 and the second circuit board 302 to be staggered within the same space, rationally allocating space and improving space utilization.

[0091] In some embodiments, the second surface 133 is provided with a first mounting column 17, which extends toward the top plate 22, and a gap is left between the first mounting column 17 and the end face of the enclosure 16 to form a positioning opening. For example, the first mounting column 17 is hollow inside, the first mounting column 17 is integrally formed with the partition 13, and there are multiple first mounting columns 17, which are distributed along the circumference of the partition 13.

[0092] A second mounting post 24 is provided on the side of the top plate 22 facing the partition plate 13. The second mounting post 24 extends towards the partition plate 13 and protrudes from the end face of the side plate 23. The second mounting post 24 is fixedly connected to the first mounting post 17 by a fastener. For example, the second mounting post 24 is hollow inside and is integrally formed with the top plate 22. There are multiple second mounting posts 24, and the positions of the multiple second mounting posts 24 correspond to the positions of the multiple first mounting posts 17. The second mounting post 24 is inserted into the positioning hole and docks with the corresponding first mounting post 17. The fastener can be a fixing screw, which passes through the second mounting post 24 and is threadedly connected to the first mounting post 17 to achieve a fixed connection between the first housing 10 and the second housing 20.

[0093] In some embodiments, exhaust ports 101 are provided on the enclosure 16 and / or side panels 23. Multiple exhaust ports 101 are provided, and these ports are elongated and spaced apart. In the example of this application, both the enclosure 16 and the side panels 23 have exhaust ports 101. Specifically, multiple exhaust ports 101 are provided on opposite sides of the enclosure 16, and multiple exhaust ports 101 are also provided on opposite sides of the side panels 23. In other embodiments, exhaust ports 101 may also be provided individually on the enclosure 16 or the side panels 23, as long as the pressure relief and exhaust requirements are met; this application does not impose any limitations on this.

[0094] In some embodiments, a wiring port 102 is provided at the junction of the first housing 10 and the second housing 20, and the wiring port 102 is configured to expose the second receiving cavity 21. The wiring port 102 and the vent 101 are distributed on different sides of the housing assembly 100 to avoid interference between the wiring port 102 and the vent 101. The housing assembly 100 also includes a cover 50 that covers the wiring port 102 and is detachably connected to the first housing 10 and / or the second housing 20.

[0095] It is understood that when the cover 50 is removed from the wiring port 102, the second receiving cavity 21 is exposed to the wiring port 102, so as to facilitate the user to perform maintenance or repair operations on the electronic components in the second receiving cavity 21. After the user completes the operation, the cover 50 can be reinstalled on the wiring port 102 to cover and protect the electronic components in the second receiving cavity 21.

[0096] For example, a first opening 18 is provided on the side of the enclosure 16 near the side panel 23, and a second opening 25 is provided on the portion of the side panel 23 adjacent to the first opening 18. The first opening 18 and the second opening 25 together form a wiring port 102. In other embodiments, the first opening 18 may be provided separately for the enclosure 16, or the second opening 25 may be provided separately for the side panel 23, and the wiring port 102 may be formed in the first opening 18 or the second opening 25.

[0097] For example, the side of the cover 50 facing the wiring port 102 is provided with a connecting tube 51 and a fastener. The fastener is located on the side of the cover 50 near the enclosure wall 16, enters the second receiving cavity 21, and engages with the enclosure wall 16 from the inside of the second receiving cavity 21, thereby achieving the engagement of the cover 50 with the first housing 10. The connecting tube 51 is located on the side of the cover 50 near the side plate 23, enters the second receiving cavity 21, and the top plate 22 is provided with a connecting screw. The connecting screw passes through the top plate 22 and is threaded to the connecting tube 51, thereby achieving the bolting connection of the cover 50 with the second housing 20. In this way, the cover 50 is fixed between the first housing 10 and the second housing 20 through the engagement and bolting method.

[0098] In other embodiments, the cover 50 may also be disposed between the first housing 10 and the second housing 20 by means of interference fit, flip fit, push-pull fit, etc., as long as the cover 50 can achieve the function of closing or exposing the second receiving cavity 21, this application does not impose any restrictions on this.

[0099] In some embodiments, a handle 103 is provided at the junction of the first housing 10 and the second housing 20, the wiring port 102 and the handle 103 are distributed on opposite sides of the housing assembly 100, and the exhaust port 101 is opened at the part of the housing assembly 100 between the handle 103 and the wiring port 102.

[0100] Thus, when the housing assembly 100 is placed horizontally on a fixed object such as the ground, the handle 103 is located on the upper side of the housing assembly 100 to facilitate user gripping, while the exhaust ports 101 located on both sides of the housing assembly 100 are not covered or blocked by the fixed object, ensuring the realization of the pressure relief and exhaust function.

[0101] For example, the handle 103 is hollow and communicates with the second receiving cavity 21, allowing wires within the second receiving cavity 21 to pass through. A first handle portion 19 is provided on the portion of the enclosure 16 near the side panel 23, and the first handle portion 19 is located on the side of the enclosure 16 away from the first opening 18. A second handle portion 26 is provided on the portion of the side panel 23 near the enclosure 16, and the second handle portion 26 is located on the side of the side panel 23 away from the second opening 25. The first handle portion 19 and the second handle portion 26 together constitute the handle 103. In other embodiments, the first handle portion 19 may be provided separately for the enclosure 16, or the second handle portion 26 may be provided separately for the side panel 23; this application does not limit this.

[0102] like Figures 1 to 3As shown in the illustration, this application also provides an energy storage device 1000, which can be a portable outdoor power supply, a home emergency power supply, a desktop UPS (Uninterruptible Power Supply), or other similar devices. The energy storage device 1000 includes a battery cell assembly 200, a first circuit board 301, and a housing assembly 100 as described in any of the above embodiments. The battery cell assembly 200 is housed and confined within a first receiving cavity 11 of the housing assembly 100, and the circuit board assembly 300 is housed within a second receiving cavity 21 of the housing assembly 100. In this embodiment, the energy storage device 1000 further includes a third circuit board and a functional component 400, wherein the third circuit board is housed within the first receiving cavity 11, and the functional component 400 is assembled into a second housing 20.

[0103] The working principle and beneficial effects of the energy storage device 1000 provided in this application can be specifically described in the relevant descriptions in the foregoing embodiments, and will not be repeated here.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A housing assembly, characterized by, Applied to energy storage devices, the energy storage devices include cell assemblies and circuit board assemblies, the housing assembly includes: A first housing has a first receiving cavity configured to receive the battery cell assembly; A second housing is fixed to one end of the first housing, and the second housing and the first housing enclose a second receiving cavity, which is configured to receive the circuit board assembly. Wherein, the first housing is provided with a pressure relief hole at one end near the second housing, and the pressure relief hole is connected to the first receiving cavity; the first housing and / or the second housing is provided with an exhaust port, and the exhaust port is connected to the second receiving cavity; The pressure relief hole is configured for the assembly of a pressure relief valve. When the temperature rises in the first receiving cavity, the gas in the first receiving cavity is discharged to the outside of the second housing via the pressure relief valve and the exhaust port.

2. The housing assembly of claim 1, wherein, The first housing is provided with a partition, the first side of the partition and the first housing enclose the first receiving cavity to form the first receiving cavity, and the second side of the partition and the second housing enclose the second receiving cavity to form the second receiving cavity; the pressure relief hole is opened in the partition and penetrates the first side and the second side.

3. The housing assembly of claim 2, wherein, The first receiving cavity is configured to receive the battery cell assembly in an inverted state, and the first surface is provided with a slot, which is configured for the insertion of the ends of each battery cell of the battery cell assembly.

4. The housing assembly of claim 2, wherein, The first housing has a gap between one end of the first housing and the second housing and the second surface to form a wall, and the wall, the partition and the second housing together form the second receiving cavity.

5. The housing assembly of claim 4, wherein, The energy storage device also includes functional components; The second housing includes a top plate and side plates arranged circumferentially along the top plate. The top plate is disposed opposite to the partition, and the side plates are abutted against the enclosure wall. The top plate is configured to assemble the functional components.

6. The housing assembly of claim 5, wherein, The exhaust port is located in the enclosure wall and / or the side panel.

7. The housing assembly of claim 1, wherein, A wiring port is provided at the junction of the first housing and the second housing, and the wiring port is configured to expose the second receiving cavity; the wiring port and the vent are distributed on different sides of the housing assembly; The housing assembly also includes a cover that covers the wiring port and is detachably connected to the first housing and / or the second housing.

8. The housing assembly of claim 7, wherein, A handle is provided at the junction of the first housing and the second housing. The wiring port and the handle are distributed on opposite sides of the housing assembly. The exhaust port is located on the housing assembly between the handle and the wiring port.

9. The housing assembly of claim 1, wherein, The housing assembly also includes a pressure relief valve disposed at the pressure relief port, and the pressure relief valve is one or more of a waterproof and breathable membrane, an elastic valve, and a metal valve.

10. An energy storage device, characterized by, The energy storage device includes a battery cell assembly, a circuit board assembly, and a housing assembly as described in any one of claims 1 to 9, wherein the battery cell assembly is housed and confined within a first receiving cavity of the housing assembly, and the circuit board assembly is housed within a second receiving cavity of the housing assembly.

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