Housing assembly, battery pack, and storage power supply

Abstract

To provide a housing assembly which enables improvement of connection stability and reduction of an operation life of a battery pack including a fluid therein, and to provide a battery pack and a storage power supply.SOLUTION: A housing assembly includes a housing (11) and the housing (11) is provided with a storage chamber (112). A first bracket (111) is provided on an inner surface of the storage chamber (112) and used to attach a cell (12). The cell (12) is provided with a first explosion-proof valve. A support structure (1114) is provided at the first bracket (111). The support structure (1114) supports the cell (12) and generates a gap between the first explosion-proof valve and the inner wall of the storage chamber (112) to form a pressure-reduced space (1113). The pressure-reduced space (1113) communicates with the storage chamber (112), and a valve port of the first explosion-proof valve is directed to the pressure-reduced space (1113).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present application relates to the field of storage power supply technology, and more particularly to a housing assembly, a battery pack, and a storage power supply. [Background technology]

[0002] In related technology, energy storage power supplies have taken measures to prevent thermal runaway by adding insulation to the battery module, thereby extending the time during which the battery thermal runaway can occur, lowering the maximum temperature within the module during battery thermal runaway, and preventing fires when the spray valve is activated due to battery runaway. Alternatively, the battery module design uses liquid cooling technology and endothermic phase change material technology to timely dissipate heat released from the cell when thermal runaway occurs. However, these measures not only increase material costs and process difficulty, but also increase the volume and weight of the energy storage power supply. Summary of the Invention [Problem to be solved by the invention]

[0003] The embodiments of the present application provide a housing assembly, a battery pack, and a storage power source that can solve or improve the technical problem that when high-pressure fluid passes through a battery pack, the battery pack is easily damaged by the pressure of the high-pressure fluid, thereby reducing the connection stability and operating life of the fluid battery pack. [Means for solving the problem]

[0004] A housing assembly according to an embodiment of the present application includes a housing, a storage chamber provided in the housing, a first bracket provided on an inner wall of the storage chamber, the first bracket being used to mount a cell, a first explosion-proof valve provided on the cell, a support structure provided on the first bracket, the support structure supporting the cell and forming a gap between the first explosion-proof valve and the inner wall of the storage chamber, thereby forming a reduced pressure space, the reduced pressure space communicating with the storage chamber, and a valve port of the first explosion-proof valve facing the reduced pressure space.

[0005] In this way, a support structure is installed on the first bracket, and the valve port of the first explosion-proof valve faces the reduced pressure space formed by the support structure and the cell. Therefore, if thermal runaway occurs in the cell, the material ejected from the first explosion-proof valve can enter the reduced pressure space and flow out of the battery pack to the outside, thereby reducing the pressure inside the cell in a timely manner without increasing material costs, process difficulty, or the volume and weight of the storage power source.

[0006] In some embodiments, the first bracket is integrally molded to the housing.

[0007] In this way, by integrally molding the first bracket and the housing, the cell can be fixed to the housing, which eliminates the need for a module fixing structure and eliminates the need for the battery pack to leave space for module installation, reducing the volume of the storage power source and improving the volumetric energy density of the storage power source, thereby reducing product costs.

[0008] In some embodiments, the first bracket has a fixing portion, a first fixing groove is provided on the fixing portion, the first fixing groove is used to fit onto one end of the cell, and the support structure is provided within the first fixing groove.

[0009] In this way, by providing the first fixing groove in the fixing portion of the first bracket, one end of the cell is fixed in the first fixing groove, preventing the cell from moving. The cell can be further fixed by abutting the cell against the support structure.

[0010] In some embodiments, an opening is provided in a side wall of the first fixing groove, and the reduced pressure space communicates with the storage chamber through the opening.

[0011] In this way, by installing an opening in the side wall of the first fixing groove, the reduced pressure space is connected to the storage chamber, thereby allowing the substance ejected from the cell to be discharged from the first fixing groove, thereby achieving the purpose of reducing pressure.

[0012] In some embodiments, a gap is formed between a side wall of the first fixing groove and a side wall of the cell, and the reduced pressure space is communicated with the storage chamber through the gap.

[0013] In this way, by forming a gap between the side wall of the first fixing groove and the side wall of the cell, the substance ejected from the cell can flow into the storage chamber through the gap, thereby achieving the purpose of reducing pressure.

[0014] In some embodiments, the fixing portion is provided with a plurality of first fixing grooves arranged in parallel, the support structure includes two protruding ribs, the two protruding ribs pass through the plurality of first fixing grooves to form a guide passage, and the valve port of the first explosion-proof valve faces the guide passage and is connected to the storage chamber by the guide passage.

[0015] In this way, multiple first fixing grooves are provided in parallel in the fixing part, so multiple cells can be fixed and space utilization can be improved.By forming the support structure as a guide passage and aligning the valve opening of the first explosion-proof valve toward the guide passage, materials ejected from the cells can be introduced into the storage chamber through the guide passage, thereby achieving the purpose of reducing pressure.

[0016] In some embodiments, the cell is a cylindrical cell, the first locking groove is a circular groove, the protruding rib includes an arc segment, the arc segment is disposed along the periphery of the first locking groove, at least a portion of the arc segment contacts a bottom wall of the cylindrical cell, and the arc segment is closer to the groove wall of the first locking groove than the center of the first locking groove.

[0017] In some embodiments, the first fixing groove is a circular groove, and the protruding rib further includes a straight line segment, the straight line segment being connected to two adjacent circular arc segments.

[0018] In this way, the first fixing groove fixes the cell, and the shape of the first fixing groove matches the shape of the cell, thereby stably fixing the cell and improving space utilization. The part of the protruding rib located in the first fixing groove is arranged in an arc shape centered on the center of the first fixing groove, and the part of the protruding rib that contacts the cell is arranged along the periphery of the first fixing groove, so that the load applied to the bottom wall of the cell is uniform and large deformation of the bottom wall can be avoided to a certain extent, thereby improving the safety of the entire cell.

[0019] In some embodiments, the first bracket comprises a plurality of spaced apart fixing posts, the plurality of fixing posts forming a first fixing groove, the first fixing groove being fitted into one end of the cell, and the support structure being provided on the fixing posts.

[0020] In this way, by providing multiple fixing columns to surround and form the first fixing groove, one end of the cell can be fixed to the first fixing groove and the cell can be prevented from moving, and a support structure is provided on the fixing columns to fix the cell and form a decompression space, guiding the decompression of the cell.

[0021] In some embodiments, the distance between the first explosion-proof valve and the inner wall of the storage chamber is 2 mm or more.

[0022] In this way, by setting the gap between the first explosion-proof valve and the inner wall of the storage chamber to 2 mm or more, a reduced pressure space can be formed, and the reduced pressure space allows the substance ejected from the cell to quickly flow into the storage chamber, thereby achieving the purpose of rapid decompression.

[0023] In some embodiments, the first explosion-proof valve is offset from the support structure.

[0024] In this way, the first explosion-proof valve is blocked by the support structure, avoiding explosion due to failure of the cell to depressurize.

[0025] In some embodiments, the support structure is a protrusion extending from the interior wall of the storage chamber.

[0026] In this way, by forming a support structure on the inner wall of the storage chamber, it is possible to support the cell and at the same time form a decompression space, thereby guiding the decompression of the cell.

[0027] In some embodiments, the battery pack includes a second bracket, the second bracket connected to the housing, and one end of the cell connected to the first bracket and the other end connected to the second bracket.

[0028] In this way, by connecting the second bracket to the housing and the other end of the cell to the second bracket, the cell is further fixed by the second bracket, thereby enhancing the stability of the cell within the battery pack.

[0029] In some embodiments, a first fixing groove is provided on the first bracket, a second fixing groove is provided on the second bracket, the first fixing groove is used to fit one end of the cell, and the second fixing groove is used to fit the other end of the cell, the cell is provided with a second explosion-proof valve, the first explosion-proof valve and the second explosion-proof valve are respectively provided on opposite sides of the cell, and the second bracket and the second explosion-proof valve are provided with a clearance.

[0030] In this way, by installing a second fixing groove on the second bracket, the other end of the cell can be fixed by the second fixing groove. A second explosion-proof valve is installed on the cell, and the second explosion-proof valve and the first explosion-proof valve are installed at both ends of the cell, respectively, thereby accelerating the decompression of the cell. The second bracket and the second explosion-proof valve are installed with a clearance to prevent the second explosion-proof valve from being blocked.

[0031] In some embodiments, a through hole is provided in the bottom surface of the second fixing groove, the cell includes a positive electrode and a negative electrode, the through hole is used to connect a bus bar to the positive electrode and the negative electrode of the plurality of cells through the through hole, and the bus bar and the second explosion-proof valve are provided with a clearance.

[0032] In this way, by providing a bus bar to connect the positive and negative electrodes of multiple cells, the multiple cells are connected in series, and the bus bar and the second explosion-proof valve are provided with a clearance, so that the second explosion-proof valve can be prevented from being blocked.

[0033] A battery pack according to an embodiment of the present application includes a cell and a housing assembly according to any one of the above embodiments.

[0034] An energy storage power supply according to an embodiment of the present application includes a cell, an inverter, and the housing assembly according to any one of the above embodiments, wherein the cell and the inverter are attached to the housing assembly, and the inverter is electrically connected to the cell. In some embodiments, the energy storage power supply includes a fan in the storage chamber, the housing assembly includes a guide passage, the fan is used to blow air through or exhaust air from the guide passage, and the direction of the airflow formed by the fan is the same as the extension direction of the guide passage.

[0035] In this way, by providing a fan inside the storage chamber, the fan dissipates heat from the storage power source.

[0036] In some embodiments, the storage power source has a ventilation structure, and the storage chamber is in communication with the outside through the ventilation structure.

[0037] By providing a ventilation structure in this way, the storage chamber can be connected to the outside, and as a result, the substance ejected from the cell can be discharged from the storage chamber to the outside, thereby achieving the purpose of reducing pressure.

[0038] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief explanation of the drawings]

[0039] The above and / or additional aspects and advantages of the present application will become apparent and easier to understand from the following description of the embodiments taken in conjunction with the drawings. [Figure 1] 1 is a structural schematic diagram of a storage power supply according to some embodiments of the present application; [Figure 2] FIG. 1 is a diagram illustrating an explosion diagram of a storage power source according to some embodiments of the present application. [Figure 3] 1 is a structural schematic diagram of a housing assembly according to some embodiments of the present application. [Figure 4] FIG. 2 is another structural schematic diagram of a housing assembly according to some embodiments of the present application. [Figure 5] 1 is another structural schematic diagram of a housing assembly according to some embodiments of the present application. [Figure 6] FIG. 1 is a cross-sectional schematic view of a housing assembly according to some embodiments of the present application. [Figure 7] 1 is a structural schematic diagram of a portion of a storage power source according to some embodiments of the present application; [Figure 8] 1 is a structural schematic diagram of a first bracket according to some embodiments of the present application. FIG. [Figure 9] FIG. 1 is a cross-sectional schematic diagram of a storage power source according to some embodiments of the present application. [Figure 10] 10A-10C are further structural schematic diagrams of a housing assembly according to some embodiments of the present application. [Figure 11] 1 is a structural schematic diagram of a housing and a second bracket according to some embodiments of the present application. [Figure 12] FIG. 1 is a top view of a housing assembly according to some embodiments of the present application. [Figure 13] FIG. 2 is another cross-sectional schematic view of a housing assembly according to some embodiments of the present application. [Figure 14] 1 is a structural schematic diagram of a cell according to some embodiments of the present application. [Figure 15] 1 is a structural schematic diagram of a cell according to some embodiments of the present application. [Figure 16] 1 is a structural schematic diagram of a cell according to some embodiments of the present application. [Figure 17] 1 is a structural schematic diagram of a cell according to some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0040] Hereinafter, the embodiments of the present application shown in the drawings will be described in detail, and in all the drawings, the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described through the following reference drawings are illustrative and are intended to explain the present application, and should not be understood as limitations on the present application.

[0041] The following disclosure provides many different embodiments or examples for realizing different structures of the present application. To simplify the disclosure of the present application, specific example components and configurations are described below. Of course, these are merely examples and are not intended to limit the present application. Although the present application may repeat reference numerals and / or characters in different embodiments, such repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or configurations discussed. Although the present application provides examples of various specific processes and materials, those skilled in the art may recognize the application of other processes and / or the use of other materials.

[0042] 1, 2, and 3, a housing assembly 10 according to an embodiment of the present application includes a housing 11. A storage chamber 112 is provided in the housing 11, a first bracket 111 is provided on the inner wall of the storage chamber 112, the first bracket 111 is used to mount a cell 12, a first explosion-proof valve 121 is provided on the cell 12, and a support structure 1114 is provided on the first bracket 111, the support structure 1114 supports the cell 12 and is used to create a gap between the first explosion-proof valve 121 and the inner wall of the storage chamber 112 to form a reduced pressure space 1113, the reduced pressure space 1113 is connected to the storage chamber 112, and the valve port of the first explosion-proof valve 121 faces the reduced pressure space 1113.

[0043] In this way, the support structure 1114 is installed on the first bracket 111, and the valve port of the first explosion-proof valve 121 faces the reduced pressure space 1113 formed by the support structure 1114 and the cell 12. Therefore, if thermal runaway occurs in the cell 12, the material ejected from the first explosion-proof valve 121 can enter the reduced pressure space 1113 and flow out of the housing assembly 10 to the outside, thereby reducing the pressure inside the cell 12 in a timely manner without increasing material costs, process difficulty, or the volume and weight of the storage power source 100.

[0044] The energy storage power supply 100 is a device capable of storing power and can be used as a mobile power source, storing large amounts of power, and transmitting the stored power to other electrical devices. The energy storage power supply 100 includes cells 12, bus bars 17, an inverter 20, and a housing assembly 10. The cells 12 can provide power, and the bus bars 17 can connect the positive electrodes 123 and negative electrodes 124 of the multiple cells 12. The inverter 20 is a converter capable of converting DC power to constant frequency / constant voltage or variable frequency / variable voltage AC power. For example, the inverter 20 can convert DC power (e.g., from a battery, battery bottle, etc.) to AC power, convert AC power to DC power, convert low voltage to high voltage, or convert high voltage to low voltage.

[0045] A battery pack (not shown) includes cells 12, bus bars 17, and a housing assembly 10. The bus bars 17 can connect the positive electrodes 123 and negative electrodes 124 of multiple cells 12, so that when the battery pack is connected to the storage power source 100 via a power line or when the battery pack is connected to the storage power source 100 by insertion connection, the battery pack can expand the power capacity of the storage power source 100.

[0046] Specifically, the housing assembly 10 includes a housing 11. The housing 11 includes a first housing and a second housing, and the first housing can be connected to the second housing. For example, the first housing can be connected to the second housing via a bolt, or the first housing can be connected to the second housing via a buckle. Because the housing 11 is cylindrical in shape, the housing 11 can form a storage chamber 112, which can house the cells 12 and other structures.

[0047] A first bracket 111, i.e., the bottom wall of the housing 11, is provided on the inner wall of the storage chamber 112. The first bracket 111 can be used to fix the cell 12. A support structure 1114 is provided on the first bracket 111. The support structure 1114 can be a protrusion protruding from the inner wall of the storage chamber 112. For example, the support structure 1114 can be a flat surface protruding from the inner wall of the storage chamber 112 or a rib protruding from the inner wall of the storage chamber 112. Therefore, the support structure 1114 supports the cell 12 and can space one end of the cell 12 from the inner wall of the storage chamber 112, thereby forming a reduced-pressure space 1113 between the cell 12 and the inner wall of the storage chamber 112. The reduced pressure space 1113 can be connected to the storage chamber 112, and the storage chamber 112 is connected to the outside of the housing 11, so that the reduced pressure space 1113 can guide the substance that has entered the reduced pressure space 1113 and discharge the substance from the storage power source 100.

[0048] The cell 12 can store electricity and output electricity when needed, and can convert electricity into chemical energy for storage, and can reconvert the chemical energy into electricity and release it when needed. The cell 12 is fixed by attaching it to the first bracket 111.

[0049] A first explosion-proof valve 121 is installed on the end face of the cell 12 close to the first bracket 111, and the distance between the first explosion-proof valve 121 and the inner wall of the storage chamber 112 is 2 mm or more, so that a decompression space 1113 can be formed between the first explosion-proof valve 121 and the inner wall of the storage chamber 112, and the decompression space 1113 can quickly flow the material ejected from the cell 12 into the storage chamber 112, thereby achieving the purpose of rapid decompression.

[0050] The valve port of the first explosion-proof valve 121 can face the decompression space 1113, and the first explosion-proof valve 121 is installed offset from the support structure 1114, thereby preventing the first explosion-proof valve 121 from being blocked by the support structure 1114 and allowing materials ejected from the first explosion-proof valve 121 to flow into the decompression space 1113. A thin position or thin device is provided inside the first explosion-proof valve 121, and when the pressure in the cell 12 increases, the thin position is opened by the pressure, thereby releasing the pressure in the cell 12 and preventing explosion or fire of the cell 12 due to abnormalities such as overcharging, over-discharging, and short circuiting of the cell 12.

[0051] Referring to FIG. 2, in some embodiments, the first bracket 111 is integrally molded into the housing 11 .

[0052] In this way, by integrally molding the first bracket 111 and the housing 11, the cells 12 can be fixed to the housing 11, thereby eliminating the need for a module fixing structure, and the housing assembly 10 does not need to leave space for module installation, reducing the volume of the storage power source 100, improving the energy density of the storage power source 100, and reducing the volume, weight, and cost of the product.

[0053] Specifically, the first bracket 111 and the housing 11 can be formed by an integral molding manufacturing process. For example, when the first bracket 111 and the housing 11 are made of a metal material, the first bracket 111 and the housing 11 are manufactured by methods such as sand casting, pressure casting, or air pressure casting, i.e., molten metal or alloy is injected into a pre-fabricated mold and formed after solidification and cooling. When the first bracket 111 and the housing 11 are made of a plastic material, molten plastic material is injected into a mold under high pressure and formed after cooling and solidification to obtain the first bracket 111 and the housing 11 in the required shape and size.

[0054] This eliminates the need to assemble the cells 12 into modules and then mount multiple modules into the housing assembly 10 to form a third assembly mode of "cells 12-modules-housing assembly 10," and instead allows the cells 12 to be directly integrated into the housing assembly 10, simplifying the assembly flow. This significantly simplifies the structure of the housing assembly 10, improves space utilization, further increases the energy density of the battery, and reduces costs.

[0055] Referring to Figure 2, in some embodiments, the first bracket 111 has a fixing portion 1111, and the fixing portion 1111 is provided with a first fixing groove 1112, which is used to fit onto one end of the cell 12, and the support structure 1114 is provided within the first fixing groove 1112.

[0056] In this way, by installing the first fixing groove 1112 in the fixing portion 1111 of the first bracket 111, one end of the cell 12 is fixed to the first fixing groove 1112, preventing movement of the cell 12. The cell 12 can be further fixed by abutting the support structure 1114 against the cell 12.

[0057] Specifically, the first bracket 111 includes a fixing portion 1111 that protrudes from the inner wall of the housing 11. The fixing portion 1111 has a first fixing groove 1112 formed therein. The shape and size of the first fixing groove 1112 correspond to the shape and size of the end face of the cell 12. For example, if the cell 12 is cylindrical, the first fixing groove 1112 has a round shape, and if the cell 12 is a square pillar, the first fixing groove 1112 has a rectangular shape. The position of the first fixing groove 1112 on the first bracket 111 corresponds to the position of the cell 12, so that one end of the cell 12 can be fitted into the first fixing groove 1112, and the fixing portion 1111 can fix the cell 12. A support structure 1114 can be provided in the first fixing groove 1112, so that the cell 12 can be inserted into the first fixing groove 1112 and abutted by the support structure 1114, thereby further fixing the cell 12.

[0058] The number of first fixed grooves 1112 matches the number of cells 12, thereby allowing the reduced pressure space 1113 to be connected to a row of multiple first fixed grooves 1112 arranged in an array, and allowing substances ejected from the first explosion-proof valve 121 of the cell 12 to flow into the reduced pressure space 1113.

[0059] 2 and 3, in some embodiments, an opening 11121 is provided in the side wall of the first fixing groove 1112, and the reduced pressure space 1113 communicates with the storage chamber 112 through the opening 11121.

[0060] In this way, by installing an opening 11121 on the side wall of the first fixing groove 1112, the reduced pressure space 1113 can be connected to the storage chamber 112, thereby allowing the substance ejected from the cell 12 to be guided out of the first fixing groove 1112, thereby achieving the purpose of reducing pressure.

[0061] Specifically, an opening 11121 is provided on the side wall of the first fixing groove 1112, and the opening 11121 can connect the decompression space 1113 to the storage chamber 112, so that the material in the decompression space 1113 can enter the storage chamber 112. The number of openings 11121 may be multiple, for example, two or four, and the multiple openings 11121 may be installed symmetrically on the side wall of the first fixing groove 1112.

[0062] Referring to FIG. 4, in some embodiments, a gap 1116 is formed between the side wall of the first fixing groove 1112 and the side wall of the cell 12, and the reduced pressure space 1113 is connected to the storage chamber 112 through the gap 1116.

[0063] In this way, by forming a gap 1116 between the side wall of the first fixing groove 1112 and the side wall of the cell 12, the substance ejected from the cell 12 can flow through the gap 1116 into the storage chamber 112, thereby achieving the purpose of reducing pressure.

[0064] Specifically, since the diameter of the cell 12 can match the diameter of the first fixing groove 1112, the side wall of the first fixing groove 1112 and the side wall of the cell 12 can form a gap 1116, and the reduced pressure space 1113 is connected to the storage chamber 112 through the gap 1116, so that the substance ejected from the cell 12 into the reduced pressure space 1113 can flow into the storage chamber 112 through the gap 1116.

[0065] In some embodiments, referring to FIG. 5, an irregular decompression groove 1117 is provided in the first fixed groove 1112 in the direction along the groove, the decompression groove 1117 is located between the cell 12 and the side wall of the first fixed groove 1112, and the decompression groove 1117 can communicate with the storage chamber 112, so that the substance ejected from the cell 12 into the decompression space 1113 can flow into the storage chamber 112 through the decompression groove 1117.

[0066] Referring to Figure 6, in some embodiments, the fixed portion 1111 has a plurality of first fixed grooves 1112 arranged in parallel, the support structure 1114 includes two protruding ribs 11141, which pass through the plurality of first fixed grooves 1112 to form a guide passage 11142, and the valve port of the first explosion-proof valve 121 faces the guide passage 11142 and is connected to the storage chamber 112 through the guide passage 11142.

[0067] In this way, a plurality of first fixing grooves 1112 are provided in parallel in the fixing part 1111, thereby fixing a plurality of cells 12 and improving space utilization. By forming the support structure 1114 as a guide passage 11142 and orienting the valve port of the first explosion-proof valve 121 toward the guide passage 11142, the substance ejected from the cell 12 can enter the storage chamber 112 through the guide passage 11142, thereby achieving the purpose of reducing pressure.

[0068] Specifically, the fixing part 1111 is provided with a plurality of first fixing grooves 1112 arranged in parallel, for example, the first fixing grooves 1112 can be arranged in an array in the receiving chamber 112. The support structure 1114 includes two parallel protruding ribs 11141, which can pass through the plurality of first fixing grooves 1112 to form a guide passage 11142 that communicates with the receiving chamber 112. The valve port of the first explosion-proof valve 121 of the cell 12 faces the guide passage 11142, so that the material ejected from the cell 12 can flow into the receiving chamber 112 through the guide passage 11142.

[0069] 7, 8 and 17, in some embodiments, the cell 12 is a cylindrical cell 12, the first fixing groove 1112 is a circular groove, and the protruding rib 11141 includes an arc segment 11144, the arc segment 11144 is arranged along the periphery of the first fixing groove 1112, at least a portion of the arc segment 11144 contacts the bottom wall 126 of the cylindrical cell, and the arc segment is closer to the groove wall of the first fixing groove 1112 than the center of the first fixing groove 1112. Furthermore, the protruding rib 11141 further includes a straight segment 11145, which is connected to two adjacent arc segments 11144.

[0070] In this way, the first fixing groove 1112 fixes the cell 12, and the shape of the first fixing groove 1112 matches the shape of the cell 12, thereby stably fixing the cell 12 and improving space utilization. The portion of the protruding rib 11141 that contacts the cell 12 is arranged along the periphery of the first fixing groove 1112, so that the load applied to the bottom wall 126 of the cell 12 is uniform and large deformation of the bottom wall 126 can be avoided to a certain extent, thereby improving the safety of the entire cell 12.

[0071] Specifically, the cell 12 is a cylindrical cell, and the support structure 1114 includes two protruding ribs 11141, each of which includes an arc segment 11144 and a straight segment 11145. The arc segment 11144 is arranged along the periphery of the first fixing groove 1112, and within an allowable error range, the distance from any point on the inner wall of the first fixing groove 1112 to the center of the first fixing groove 1112 is equal. The circle formed by the arc segment 11144 of the protruding rib, the circle formed by the first fixing groove 1112, and the circle enclosed by the side wall 125 of the cylindrical cell are concentric. In this way, when the cell 12 is accommodated in the first fixing groove 1112, the force exerted by the protruding ribs 11141 on the bottom wall of the cell 12 can be made more uniform.

[0072] Along the axial direction of the cylindrical cell, at least a portion of the projection of the arc segment 11144 is located within the projection of the first fixing groove 1112. Thus, after the cell 12 is stored in the first fixing groove 1112, the bottom wall 126 of the cell 12 contacts at least a portion of the arc segment 11144. This forms a reduced pressure space 1113 between the arc segment 11144, the bottom wall 126 of the cylindrical cell, and the inner wall of the storage chamber 112. At the same time, multiple arc segments 11144 are connected via straight segments 11145, which can guide the flow of the ejecta from the cell 12.

[0073] The cells 12 are housed in the first fixing grooves 1112. The cells 12 are cylindrical cells, and the side walls 125 of the cylindrical cells are fixed to the inner wall surfaces of the first fixing grooves 1112, so that the first fixing grooves 1112 serve as assembly guides and fixes the cylindrical cells. As shown in Figure 8, the fixing part 1111 is provided with a plurality of first fixing grooves 1112, which are arranged in rows, and the first fixing grooves 1112 in each row are staggered. In this way, the installation space for the cells 12 can be saved and the energy density of the storage power source 100 can be improved.

[0074] Compared to the center of the first fixing groove 1112, the arc segment 11144 is closer to the groove wall of the first fixing groove 1112. In other words, when the arc segment 11144 contacts the bottom wall 126 of the cell 12, the position of the arc segment 11144 is closer to the periphery of the bottom wall 126 than to the center of the bottom wall 126.

[0075] Meanwhile, the first explosion-proof valve 121 is prevented from being blocked by the protruding rib 11141 , so that the material ejected from the first explosion-proof valve 121 can smoothly flow into the decompression space 1113 .

[0076] On the other hand, most of the force that the bottom wall 126 of the cell 12 receives from the protruding rib 11141 can be transmitted to the side wall 125 of the cell 12, thereby reducing the force received by the bottom wall 126. When a force is received from the protruding rib 11141 along the axial direction of the cell 12, the strength of the connection points between the bottom wall 126 and the side wall 125 is higher than that of the center of the bottom wall 126, and the force that can be received is greater. At the same time, the side wall 125 of the cell 12 can receive a larger force in the direction of the force of the protruding rib 11141 (along the axial direction of the cell 12) than the bottom wall 126, and even if most of the force received from the protruding rib 11141 of the bottom wall 126 is transmitted to the side wall 125 of the cell 12, the effect of this force on the side wall 125 of the cell 12 is small. This prevents the bottom wall 126 of the cell 12 from being deformed under force and pressing against the internal jelly roll, causing problems such as short circuits, to some extent, and further improves the safety of the entire cell 12.

[0077] Optionally, in one embodiment, the position at which the protruding rib 11141 contacts the bottom wall 126 of the cell 12 exceeds the position covered by a circle whose center is the center of the bottom wall 126 and whose radius is 1 / 2 the radius of the bottom wall 126.

[0078] Optionally, in other embodiments, the position at which the protruding rib 11141 contacts the bottom wall 126 of the cell 12 exceeds the position covered by a circle whose center is the center of the bottom wall 126 and whose radius is 2 / 3 of the radius of the bottom wall 126.

[0079] 7, the two protruding ribs 11141 form openings 11121 in the arrangement direction of the cells 12, and the multiple openings 11121 are connected in sequence to form a guide passage 11142, which is connected to the storage chamber 112. The valve port of the first explosion-proof valve 121 of the cell 12 faces the guide passage 11142, so that the substance ejected by the cell 12 can flow into the storage chamber 112 through the guide passage 11142.

[0080] As shown in Figures 7 and 8, the support structure 1114 further includes a fixing wall 11143, which is arranged along the outer contour of the first fixing groove 1112. In this way, the structural strength of the support structure 1114 can be enhanced, and the fixing and protective effect for the cell 12 can be further improved.

[0081] Referring again to FIG. 3, in some embodiments, the first bracket 111 includes a plurality of spaced apart fixing posts 1115, which form a first fixing groove 1112, which is used to fit into one end of the cell 12, and the support structure 1114 is provided on the fixing posts 1115.

[0082] In this way, by providing a plurality of fixing columns 1115 to surround and form the first fixing groove 1112, one end of the cell 12 is fixed to the first fixing groove 1112, preventing the cell 12 from moving. In addition, the support structure 1114 is provided on the fixing columns 1115, which not only fixes the cell 12 but also forms a decompression space 1113 and guides the decompression of the cell 12.

[0083] Specifically, referring to FIG. 3, the first bracket 111 includes a plurality of fixed pillars 1115 spaced apart, each of which has a rectangular pillar shape and each pillar surface is an arcuate surface, thereby forming a first fixed groove 1112 between four adjacent fixed pillars 1115, and when one end of the cell 12 is inserted into the first fixed groove 1112, the one end of the cell 12 can be fitted into the first fixed groove 1112.

[0084] The support structure 1114 is mounted on the surface of the fixed post 1115 , that is, on the inner wall of the first fixed groove 1112 , so that the support structure 1114 can support one end of the cell 12 and form a reduced pressure space 1113 .

[0085] 7 and 8, the first bracket 111 includes a plurality of fixed posts 1115 spaced apart, the support structure 1114 is mounted on the fixed posts 1115, and one side of the fixed posts 1115 facing the cells 12 protrudes from the support structure 1114. The fixed posts 1115 are triangular prisms, each with an arcuate surface, so that a first fixing groove 1112 is enclosed between three adjacent fixed posts 1115, and when one end of a cell 12 is inserted into the first fixing groove 1112, the one end of the cell 12 can fit into the first fixing groove 1112.

[0086] Referring to Figures 2, 9 and 10, in some embodiments, the housing assembly 10 includes a second bracket 14, which is connected to the housing 11, and one end of the cell 12 is connected to the first bracket 111 and the other end is connected to the second bracket 14.

[0087] In this way, by connecting the second bracket 14 to the housing 11 and connecting the other end of the cell 12 to the second bracket 14, the cell 12 can be fixed by the second bracket 14, thereby enhancing the stability of the cell 12 within the housing assembly 10.

[0088] Specifically, the housing assembly 10 further includes a second bracket 14, which can be used to secure the cells 12 and provide support for the inverter 20. The second bracket 14 can be connected to the housing 11, thereby fixing the second bracket 14. For example, a first connecting post 113 is formed on an inner wall of the housing 11 facing the second bracket 14, and a second connecting post 143 is formed on an end surface of the second bracket 14 facing the housing 11. The first connecting post 113 and the second connecting post 143 can be connected by a bolt, thereby fixing the housing 11 to the second bracket 14.

[0089] One end of the cell 12 can be connected to the first bracket 111, and the other end of the cell 12 can be connected to the second bracket 14, thereby allowing the cell 12 to be fixed by the first bracket 111 and the second bracket 14.

[0090] Referring to Figures 2, 10 and 11, in some embodiments, a first fixing groove 1112 is provided on the first bracket 111, a second fixing groove 141 is provided on the second bracket 14, the first fixing groove 1112 is used to fit one end of the cell 12, and the second fixing groove 141 is used to fit the other end of the cell 12, the cell 12 is provided with a second explosion-proof valve 122, the first explosion-proof valve 121 and the second explosion-proof valve 122 are respectively provided on opposite sides of the cell 12, and the second bracket 14 and the second explosion-proof valve 122 are provided with a clearance.

[0091] In this way, by providing the second fixing groove 141 in the second bracket 14, the other end of the cell 12 can be fixed by the second fixing groove 141. The second explosion-proof valve 122 is provided in the cell 12, and the second explosion-proof valve 122 and the first explosion-proof valve 121 are provided at both ends of the cell 12, respectively, to accelerate the decompression of the cell 12. By providing a clearance between the second bracket 14 and the second explosion-proof valve 122, the second explosion-proof valve 122 is prevented from being blocked.

[0092] Specifically, second fixing grooves 141 are provided on the second bracket 14, and the shape, size, and number of the second fixing grooves 141 correspond to the shape, size, and number of the cells 12. For example, if the shape of the cells 12 is cylindrical, the shape of the second fixing grooves 141 is round; if the shape of the cells 12 is square prism, the shape of the second fixing grooves 141 is rectangular; and if there are 28 cells 12, the number of second fixing grooves 141 is 28. In addition, the positions of the second fixing grooves 141 correspond to the positions of the cells 12, so that one end of the cells 12 can be fitted into the second fixing grooves 141. The other end of the cells 12 can be fitted into the first fixing grooves 1112 to fix the cells 12 within the housing assembly 10.

[0093] A second explosion-proof valve 122 is installed on the end face of the cell 12 close to the second bracket 14, and the second explosion-proof valve 122 and the first explosion-proof valve 121 are respectively installed on both ends of the cell 12. A thinned portion or thinned device is installed inside the second explosion-proof valve 122, so that when the pressure in the cell 12 increases, the thinned portion is opened by the pressure, thereby releasing the pressure in the cell 12 and preventing the cell 12 from exploding or catching fire due to abnormalities such as overcharging, over-discharging, or short-circuiting of the cell 12.

[0094] The second bracket 14 can be installed with a clearance from the second explosion-proof valve 122, i.e., when the cell 12 is inserted and fitted into the second fixing groove 141, the second explosion-proof valve 122 needs to avoid being blocked by the second bracket 14, so that the substances produced by the cell 12 can be ejected from the second explosion-proof valve 122 and the cell 12 can be depressurized.

[0095] Referring again to Figures 2 and 10, in some embodiments, the housing assembly 10 includes a fixed seat 15 connected to the second bracket 14 and spaced apart from the cell 12, forming a heat dissipation space 16 between the fixed seat 15 and the second bracket 14.

[0096] In this way, by connecting the fixed seat 15 and the second bracket 14 and spacing them apart in the cell 12, a heat dissipation space 16 can be formed, so that material ejected from the second explosion-proof valve 122 can enter the heat dissipation space 16.

[0097] Specifically, the housing assembly 10 further includes a fixing seat 15, which can be used to fix and support the inverter 20. The fixing seat 15 can be connected to the second bracket 14 and is spaced apart from the cell 12 to form a heat dissipation space 16 between the fixing seat 15 and the second bracket 14. For example, the second bracket 14 can have a fixing strut 144 formed on an end surface thereof away from the first space, the fixing strut 144 protruding from the end surface of the second bracket 14, and the fixing strut 144 can be connected to the fixing seat 15 with a bolt. This allows materials ejected from the second explosion-proof valve 122 to enter the heat dissipation space 16.

[0098] Referring to Figures 2, 11 and 12, in some embodiments, a through hole 142 is provided on the bottom surface of the second fixing groove 141, the cell 12 includes a positive electrode 123 and a negative electrode 124, the through hole 142 is used to connect the bus bar 17 to the positive electrode 123 and the negative electrode 124 of the multiple cells 12 through the through hole 142, and the bus bar 17 is provided with a clearance in the second explosion-proof valve 122.

[0099] In this way, by providing a bus bar 17 that connects the positive electrodes 123 and negative electrodes 124 of multiple cells 12, the multiple cells 12 are connected in series, and the bus bar 17 is provided with a clearance in the second explosion-proof valve 122, thereby preventing the second explosion-proof valve 122 from being blocked.

[0100] Specifically, the housing assembly 10 further includes a bus bar 17, which is a sheet-like connecting member made of a conductive material that connects the plurality of cells 12 to form an integrated conductive structure. For example, the bus bar 17 is made of a conductive material such as copper, aluminum, a copper-aluminum alloy, or an aluminum-magnesium alloy. The bus bar 17 thereby connects the positive electrodes 123 and negative electrodes 124 of the plurality of cells 12, thereby connecting the plurality of cells 12 in series or parallel, thereby meeting different voltage and capacity requirements of the housing assembly 10.

[0101] A through-hole 142 is provided on the bottom surface of the second fixing groove 141, and the through-hole 142 allows the bus bar 17 to pass through, so that the bus bar 17 can connect the positive electrode 123 and the negative electrode 124 of the adjacent cell 12.

[0102] In some embodiments, the positive electrode 123 and the negative electrode 124 of the cell 12 can protrude from the through-hole 142 so that the bus bar 17 can connect to the positive electrode 123 and the negative electrode 124 protruding from the through-hole 142 .

[0103] The busbar 17 can be provided with a clearance at the second explosion-proof valve 122. For example, after the cell 12 is inserted and fitted into the second fixing groove 141, the second explosion-proof valve 122 can spray material from the through-hole 142 into the heat dissipation space 16, and the busbar 17 needs to avoid blocking the second explosion-proof valve 122 when connecting the positive electrode 123 and the negative electrode 124, so the busbar 17 prevents the second explosion-proof valve 122 from being blocked.

[0104] Referring to Figures 9, 14, 15 and 16, in some embodiments, the angle between the line connecting the first explosion-proof valve 121 and the second explosion-proof valve 122 and a perpendicular line passing through the second explosion-proof valve 122 is 10 degrees or less.

[0105] In this way, after determining the installation position of the second explosion-proof valve 122, the angle between the line connecting the first explosion-proof valve 121 and the second explosion-proof valve 122 and the perpendicular line passing through the second explosion-proof valve 122 is set to 10 degrees or less, which allows the installation position of the first explosion-proof valve 121 to be determined and allows the first explosion-proof valve 121 to be positioned within the reduced pressure space 1113, preventing the first explosion-proof valve 121 from being blocked.

[0106] Specifically, when the first explosion-proof valve 121 is inserted into the first fixing groove 1112, it is not possible to determine whether the position of the valve port faces the reduced pressure space 1113. Therefore, when it is necessary to install the first explosion-proof valve 121 and the second explosion-proof valve 122 in the cell 12 in order to prevent the first explosion-proof valve 121 from being blocked, the angle between the line connecting the first explosion-proof valve 121 and the second explosion-proof valve 122 and the perpendicular line passing through the second explosion-proof valve 122 must be 10 degrees or less. As a result, when the cell 12 is inserted and fitted into the second fixing groove 141, the position of the second explosion-proof valve 122 is determined by arranging the second explosion-proof valve 122 with clearance from the busbar 17 and the second bracket 14, and this in turn determines the position of the first explosion-proof valve 121.

[0107] Referring again to Figures 2 and 9, in some embodiments, the storage power supply 100 includes a fan 30 located within the storage chamber 112, the fan 30 being used to blow or exhaust air into the reduced pressure space 1113, and the airflow direction of the fan 30 being in the same direction as the extension direction of the guide passage 11142.

[0108] In this way, by providing the fan 30 inside the storage chamber 112, the fan 30 dissipates heat from the power storage power source 100.

[0109] Specifically, the energy storage power supply 100 further includes a fan 30, which is installed in the storage chamber 112 and can blow or exhaust air into the storage chamber 112. The fan 30 may be a blower 30 or a suction device 30. When the fan 30 is a blower 30, the fan 30 blows air into the storage chamber 112, causing the airflow to enter the decompressed space 1113 and dissipate heat from the cells 12 through the decompressed space 1113. When the fan 30 is a suction device 30, the fan 30 exhausts air from the storage chamber 112, creating negative pressure inside the storage chamber 112 and positive pressure outside the energy storage power supply 100, causing the airflow to enter the decompressed space 1113 under pressure differential control and dissipate heat from the cells 12 through the decompressed space 1113.

[0110] In some embodiments, there may be more than one fan 30. For example, if there are two fans 30, one can blow air into the storage chamber 112, and the other fan 30 can exhaust air from the storage chamber 112. The airflow direction formed by the fan 30 is the same as the extension direction of the guide passage 11142, so that the airflow moves within the storage chamber 112, enters the decompression space 1113, and dissipates heat from the cells 12 through the decompression space 1113.

[0111] In some embodiments, the two fans 30 are both blowers 30 and blow air in the same direction within the storage chamber 112, and the airflow direction formed by the fans 30 is the same as the extension direction of the guide passage 11142, so that the airflow enters the reduced pressure space 1113 and dissipates heat from the cells 12 through the reduced pressure space 1113.

[0112] 1, 2 and 9, in some embodiments, the storage power source 100 includes a ventilation structure 13, and the storage chamber 112 communicates with the outside through the ventilation structure 13.

[0113] In this way, by providing the ventilation structure 13, the storage chamber 112 can be connected to the outside, so that the substance ejected from the cell 12 can be discharged from the storage chamber 112 to the outside, thereby achieving the purpose of reducing the pressure.

[0114] Specifically, the storage power supply 100 includes a ventilation structure 13, which may be a ventilation sheet, which can guide or increase the flow of air inside the storage power supply 100, thereby dissipating heat from the storage power supply 100. The ventilation structure 13 can be provided on the first housing or the second housing, and may be provided on both the first and second housings at the same time. There may be more than one ventilation structure 13. For example, if there are two ventilation structures 13, the ventilation structures 13 can be provided on opposite sides of the storage power supply 100, and if there are four ventilation structures 13, the ventilation structures 13 can be provided on the periphery of the storage power supply 100.

[0115] The ventilation structure 13 can form a ventilation hole 131, which can connect the inside of the housing assembly 10 to the outside of the housing assembly, and the reduced pressure space 1113 can be connected to the ventilation hole 131, so that the substance ejected from the first explosion-proof valve 121 by the cell 12 can flow into the reduced pressure space 1113 and then flow out of the housing assembly 10 through the ventilation hole 131.

[0116] In the description herein, references such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the description herein, exemplary references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0117] While embodiments of the present application have been shown and described, those skilled in the art will recognize that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is limited only by the claims and their equivalents.

[0118] This application is a continuation of a PCT application bearing patent application number PCT / CN2025 / 072072, filed on January 13, 2025, which claims priority to and benefits of patent application number 202411260777.1, filed with the State Intellectual Property Office of China on September 9, 2024, and also claims priority to and benefits of patent application number 202422210874.1, filed with the State Intellectual Property Office of China on September 9, 2024, and also claims priority to and benefits of patent application number 202521145860.4, filed with the State Intellectual Property Office of China on June 5, 2025, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0119] 100 Storage power source, 10 Housing assembly, 11 Housing, 111 First bracket, 1111 Fixing portion, 1112 First fixing groove, 11121 Opening, 1113 Decompression space, 1114 Support structure, 11141 Protruding rib, 11142 Guide passage, 11143 Fixing wall, 11144 Arc segment, 11145 Straight segment, 1115 Fixing column, 1116 Gap, 1117 Decompression groove, 112 Storage chamber, 113 First connecting column, 12 Cell, 121 First explosion-proof valve, 122 Second explosion-proof valve, 123 Positive electrode, 124 Negative electrode, 125 Side wall, 126 Bottom wall, 13 Ventilation structure, 131 Ventilation hole, 14 Second bracket, 141 Second fixing groove, 142 Through hole, 143 Second connecting pillar, 144 fixed pillar, 15 fixed seat, 16 heat dissipation space, 17 bus bar, 20 inverter, 30 fan.

Claims

1. A housing assembly comprising a housing, a storage chamber provided in the housing, a first bracket provided on an inner wall of the storage chamber, the first bracket used to attach a cell, a first explosion-proof valve provided on the cell, a support structure provided on the first bracket, the support structure supporting the cell and forming a gap between the first explosion-proof valve and the inner wall of the storage chamber, thereby forming a reduced pressure space, the reduced pressure space being connected to the storage chamber, and a valve port of the first explosion-proof valve facing the reduced pressure space.

2. the first bracket is integrally molded with the housing; 2. The housing assembly of claim 1, wherein the first bracket has a fixing portion, a first fixing groove is provided in the fixing portion, the first fixing groove is used to fit onto one end of the cell, and the support structure is provided within the first fixing groove.

3. 3. The housing assembly according to claim 2, wherein an opening is provided in a side wall of the first fixing groove, and the reduced pressure space communicates with the storage chamber through the opening.

4. 3. The housing assembly according to claim 2, wherein a gap is formed between a side wall of the first fixing groove and a side wall of the cell, and the reduced pressure space is communicated with the storage chamber through the gap.

5. 3. The housing assembly according to claim 2, wherein the fixing portion has a plurality of first fixing grooves arranged in parallel, the support structure includes two protruding ribs, the two protruding ribs pass through the plurality of first fixing grooves to form a guide passage, and the valve port of the first explosion-proof valve faces the guide passage and communicates with the storage chamber via the guide passage.

6. 6. The housing assembly of claim 5, wherein the cell is a cylindrical cell, the first locking groove is a circular groove, the protruding rib includes an arc segment, the arc segment is arranged along the periphery of the first locking groove, at least a portion of the arc segment contacts a bottom wall of the cylindrical cell, and the arc segment is closer to the groove wall of the first locking groove than the center of the first locking groove.

7. 7. The housing assembly of claim 6, wherein the cells are cylindrical cells, the first fixing grooves are circular grooves, and the protruding ribs further include straight line segments, the straight line segments being connected to two adjacent circular arc segments.

8. 2. The housing assembly of claim 1, wherein the first bracket comprises a plurality of spaced apart fixing posts, the plurality of fixing posts each having a first fixing groove formed therein, the first fixing groove being fitted into one end of the cell, and the support structure being provided on the fixing posts.

9. 2. The housing assembly according to claim 1, wherein the gap between the first explosion-proof valve and the inner wall of the storage chamber is 2 mm or more.

10. the first explosion-proof valve is offset from the support structure; 2. The housing assembly according to claim 1, wherein the support structure is a protrusion provided to protrude from an inner wall of the storage chamber.

11. the housing assembly includes a second bracket, the second bracket is connected to the housing, one end of the cell is connected to the first bracket and the other end is connected to the second bracket; 2. The housing assembly of claim 1, wherein the first bracket has a first fixing groove, the second bracket has a second fixing groove, the first fixing groove is used to fit into one end of the cell, and the second fixing groove is used to fit into the other end of the cell, the cell is provided with a second explosion-proof valve, the first explosion-proof valve and the second explosion-proof valve are respectively provided on opposite sides of the cell, and the second bracket and the second explosion-proof valve are provided with a clearance.

12. 12. The housing assembly according to claim 11, wherein a through hole is provided in a bottom surface of the second fixing groove, the cell includes a positive electrode and a negative electrode, the through hole is used to connect a bus bar to the positive electrode and the negative electrode of the plurality of cells through the through hole, and the bus bar and the second explosion-proof valve are provided with a clearance.

13. A battery pack comprising a cell and a housing assembly according to any one of claims 1 to 12.

14. A storage power supply comprising a cell, an inverter, and a housing assembly according to any one of claims 1 to 12, wherein the cell and the inverter are attached to the housing assembly, and the inverter is electrically connected to the cell.

15. 15. The storage power supply of claim 14, wherein the storage power supply comprises a fan located in the storage chamber, the housing assembly comprises a guide passage, the fan is used to blow air through or exhaust air from the guide passage, and the direction of the airflow formed by the fan is the same as the extending direction of the guide passage.

16. The storage power supply according to claim 14, wherein the storage power supply has a ventilation structure, and the storage chamber is connected to the outside by the ventilation structure.

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