Housing assembly, battery pack, and energy storage power supply

Abstract

Disclosed are a housing assembly (10), a battery pack, and an energy storage power supply (100). The housing assembly (10) comprises a housing (11), wherein the housing (11) is provided with an accommodating cavity (112); a first support (111) is provided on an inner wall of the accommodating cavity (112), and the first support (111) is configured to mount a battery cell (12); the battery cell (12) is provided with a first explosion-proof valve (121); the first support (111) is provided with a support structure (1114) configured to support the battery cell (12) and enable the first explosion-proof valve (121) to be spaced apart from the inner wall of the accommodating cavity (112) to form a pressure relief space (1113); the pressure relief space (1113) is in communication with the accommodating cavity (112); and a valve port of the first explosion-proof valve (121) faces the pressure relief space (1113).

Description

Housing assembly, battery pack and energy storage power supply

[0001] Priority information

[0002] The present application claims priority to and the benefit of patent application number 202411260777.1 filed with the China National Intellectual Property Office on September 9, 2024, and patent application number 202422210874.1 filed with the China National Intellectual Property Office on September 9, 2024, and incorporates by reference the entirety of each thereof. TECHNICAL FIELD

[0003] The present application relates to the technical field of energy storage power supply, and more particularly, to a housing assembly, a battery pack and an energy storage power supply. BACKGROUND

[0004] In the related art, the energy storage power supply takes the measure of adding a heat insulator to the battery module for the case of thermal runaway, which can prolong the thermal runaway spreading time of the battery, reduce the maximum temperature of the battery in the module and prevent the battery from igniting when the valve is spewed. Or use liquid cooling liquid technology and heat-absorbing phase change material technology in the design of the battery module. When the battery cell is in thermal runaway, the heat generated by the battery cell is promptly dissipated. However, the above measures not only increase the material cost and process difficulty, but also increase the volume and weight of the energy storage power supply. SUMMARY

[0005] The present application provides a housing assembly, a battery pack and an energy storage power supply to solve or improve the technical problem that the battery pack is easily damaged under the pressure of the high-pressure fluid when the high-pressure fluid passes through the battery pack, thereby reducing the connection stability and working life of the fluid battery pack.

[0006] A housing assembly of an embodiment of the present application includes a housing. The housing is provided with a containing cavity, the inner wall of the containing cavity is provided with a first support, the first support is used for mounting a battery cell, the battery cell is provided with a first explosion-proof valve, the first support is provided with a support structure, the support structure is used for supporting the battery cell, and the first explosion-proof valve is spaced apart from the inner wall of the containing cavity to form a pressure relief space, the pressure relief space is communicated with the containing cavity, and the valve port of the first explosion-proof valve faces the pressure relief space.

[0007] In this way, by providing a support structure in the first support, the valve port of the first explosion-proof valve faces the pressure relief space formed by the support structure and the battery cell, so that the material spewed from the first explosion-proof valve can enter the pressure relief space and flow out of the battery pack to the outside in the case of thermal runaway of the battery cell. Without increasing the material cost, process difficulty and volume and weight of the energy storage power supply, the pressure in the battery cell is promptly reduced.

[0008] In some embodiments, the first support is integrally formed with the shell.

[0009] In this way, by integrally forming the first support with the shell, the battery cell can be fixed with the shell, thereby realizing a module-free fixing structure, and the energy storage power supply does not need to reserve a module mounting space, thereby reducing the volume of the energy storage power supply, improving the volume energy density of the energy storage power supply, and thereby reducing the product cost.

[0010] In some embodiments, the first support includes a fixing portion, the fixing portion is provided with a first fixing groove, the first fixing groove is used for being fitted with one end of the battery cell, and the support structure is arranged in the first fixing groove.

[0011] In this way, by providing the first fixing groove on the fixing portion of the first support, one end of the battery cell can be fixed with the first fixing groove, and the battery cell is prevented from moving. By abutting the support structure with the battery cell, the battery cell can be further fixed.

[0012] In some embodiments, an opening is provided on the side wall of the first fixing groove, and the pressure relief space is communicated with the accommodating cavity through the opening.

[0013] In this way, by providing the opening on the side wall of the first fixing groove, the pressure relief space is communicated with the accommodating cavity, so that the substances sprayed out of the battery cell can be guided out of the first fixing groove to achieve the purpose of pressure relief.

[0014] In some embodiments, a gap is formed between the side wall of the first fixing groove and the side wall of the battery cell, and the pressure relief space is communicated with the accommodating cavity through the gap.

[0015] In this way, by forming a gap between the side wall of the first fixing groove and the side wall of the battery cell, the substances sprayed out of the battery cell can flow from the gap into the accommodating cavity to achieve the purpose of pressure relief.

[0016] In some embodiments, the fixing portion is provided with a plurality of first fixing grooves arranged side by side, the support structure includes two protruding ribs, the two protruding ribs pass through the plurality of first fixing grooves and form a guide channel, the valve port of the first explosion-proof valve faces the guide channel, and the valve port of the first explosion-proof valve is communicated with the accommodating cavity through the guide channel.

[0017] In this way, a plurality of first fixing grooves are arranged side by side on the fixing portion, so that a plurality of battery cells can be fixed to improve the space utilization. By forming the support structure into a guide channel and facing the valve port of the first explosion-proof valve towards the guide channel, the substances sprayed out of the battery cell can enter the accommodating cavity from the guide channel to achieve the purpose of pressure relief.

[0018] In some embodiments, the first support includes a plurality of fixed columns arranged at intervals, and the plurality of fixed columns form a first fixed slot for fitting with one end of the battery cell, and the support structure is arranged on the fixed column.

[0019] In this way, by arranging a plurality of fixed columns to form a first fixed slot, the one end of the battery cell can be fixed with the first fixed slot to prevent movement of the battery cell. The support structure arranged on the fixed column can form a pressure relief space while fixing the battery cell to guide pressure relief of the battery cell.

[0020] In some embodiments, the distance between the first explosion-proof valve and the inner wall of the accommodating cavity is ≥2mm.

[0021] In this way, by setting the distance between the first explosion-proof valve and the inner wall of the accommodating cavity to be greater than or equal to 2mm, a pressure relief space can be formed, and the pressure relief space can enable the substances sprayed by the battery cell to quickly flow into the accommodating cavity to achieve the purpose of rapid pressure relief.

[0022] In some embodiments, the first explosion-proof valve is arranged away from the support structure.

[0023] In this way, the first explosion-proof valve can be prevented from being blocked by the support structure, and explosion due to failure of the battery cell to relieve pressure can be avoided.

[0024] In some embodiments, the support structure is a protrusion arranged protruding from the inner wall of the accommodating cavity.

[0025] In this way, by forming a support structure on the inner wall of the accommodating cavity, a pressure relief space can be formed while supporting the battery cell to guide pressure relief of the battery cell.

[0026] In some embodiments, the battery pack includes a second support connected to the shell, and one end of the battery cell is connected to the first support and the other end of the battery cell is connected to the second support.

[0027] In this way, by connecting the second support to the shell and connecting the other end of the battery cell to the second support, the battery cell can be further fixed by the second support to enhance the stability of the battery cell in the battery pack.

[0028] In some embodiments, the first support is provided with a first fixed slot, the second support is provided with a second fixed slot, the first fixed slot is used for fitting with one end of the battery cell, the second fixed slot is used for fitting with the other end of the battery cell, the battery cell includes a second explosion-proof valve, the first explosion-proof valve and the second explosion-proof valve are respectively arranged on opposite sides of the battery cell, and the second support is arranged away from the second explosion-proof valve.

[0029] Thus, the second fixing groove is arranged on the second support, so that the other end of the battery cell can be fixed by the second fixing groove. The second explosion-proof valve is arranged on the battery cell, and the first explosion-proof valve and the second explosion-proof valve are arranged at two ends of the battery cell respectively, so that the pressure relief of the battery cell can be accelerated. The second explosion-proof valve is arranged away from the second support, so that the second explosion-proof valve can be prevented from being blocked.

[0030] In some embodiments, a bottom surface of the second fixing groove is provided with a through hole, the battery cell includes a positive electrode and a negative electrode, the through hole is used for connecting the positive electrode and the negative electrode of a plurality of battery cells through the through hole by a busbar, and the busbar is arranged away from the second explosion-proof valve.

[0031] Thus, the busbar is arranged to connect the positive electrode and the negative electrode of a plurality of battery cells, so that the plurality of battery cells can be connected in series, and the busbar is arranged away from the second explosion-proof valve, so that the second explosion-proof valve can be prevented from being blocked.

[0032] A battery pack of an embodiment of the present application includes a battery cell and the shell assembly of any one of the above embodiments.

[0033] An energy storage power supply of an embodiment of the present application includes a battery cell, an inverter and the shell assembly of any one of the above embodiments, the battery cell and the inverter are installed in the shell assembly, and the inverter is electrically connected to the battery cell. In some embodiments, the energy storage power supply includes a fan in the accommodating cavity, the shell assembly includes a guide channel, the fan is used for air supply or air exhaust of the guide channel, and the air flow direction formed by the fan is the same as the extension direction of the guide channel.

[0034] Thus, the fan is arranged in the accommodating cavity, so that the fan can dissipate heat of the energy storage power supply.

[0035] In some embodiments, the energy storage power supply includes a ventilation structure, and the accommodating cavity is communicated with the outside through the ventilation structure.

[0036] Thus, the ventilation structure is arranged, so that the accommodating cavity can be communicated with the outside, and substances sprayed by the battery cell can be discharged from the accommodating cavity to the outside, so as to achieve the purpose of pressure relief.

[0037] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein:

[0039] FIG. 1 is a structural schematic view of an energy storage power supply of some embodiments of the present application;

[0040] Fig. 2 is an exploded view of the energy storage power supply according to some embodiments of the present application;

[0041] Fig. 3 is a structural schematic view of the housing assembly according to some embodiments of the present application;

[0042] Fig. 4 is another structural schematic view of the housing assembly according to some embodiments of the present application;

[0043] Fig. 5 is another structural schematic view of the housing assembly according to some embodiments of the present application;

[0044] Fig. 6 is a cross-sectional schematic view of the housing assembly according to some embodiments of the present application;

[0045] Fig. 7 is a cross-sectional schematic view of the energy storage power supply according to some embodiments of the present application;

[0046] Fig. 8 is another structural schematic view of the housing assembly according to some embodiments of the present application;

[0047] Fig. 9 is a structural schematic view of the housing and the second bracket according to some embodiments of the present application;

[0048] Fig. 10 is a top view of the housing assembly according to some embodiments of the present application;

[0049] Fig. 11 is another cross-sectional schematic view of the housing assembly according to some embodiments of the present application;

[0050] Figs. 12 to 14 are structural schematic views of the battery cell according to some embodiments of the present application.

[0051] BRIEF DESCRIPTION OF THE DRAWINGS 100, energy storage power supply; 10, housing assembly; 11, housing; 111, first bracket; 1111, fixing portion; 1112, first fixing groove; 11121, opening; 1113, pressure relief space; 1114, support structure; 11141, protruding rib; 11142, guide channel; 1115, fixing column; 1116, gap; 1117, pressure relief groove; 112, accommodating cavity; 113, first connecting column; 12, battery cell; 121, first explosion-proof valve; 122, second explosion-proof valve; 123, positive electrode; 124, negative electrode; 13, ventilation structure; 131, ventilation hole; 14, second bracket; 141, second fixing groove; 142, through hole; 143, second connecting column; 144, fixing support column; 15, fixing seat; 16, heat dissipation space; 17, busbar; 20, inverter; 30, fan. DETAILED DESCRIPTION

[0052] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein like or similar elements are denoted by like or similar reference numbers throughout the drawings. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0053] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the elements of the different examples of the present application are described below. Of course, they are merely examples and are not intended to limit the present application. The elements of the embodiments of the present application can be repeatedly referred to in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the embodiments of the present application provide examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0054] Referring to FIGS. 1, 2 and 3, a housing assembly 10 of an embodiment of the present application includes a housing 11. The housing 11 is provided with a receiving cavity 112, and the inner wall of the receiving cavity 112 is provided with a first support 111 for mounting an electric core 12. The electric core 12 is provided with a first explosion-proof valve 121, and the first support 111 is provided with a support structure 1114 for supporting the electric core 12 and spacing the first explosion-proof valve 121 from the inner wall of the receiving cavity 112 to form a pressure relief space 1113. The pressure relief space 1113 is in communication with the receiving cavity 112, and the valve port of the first explosion-proof valve 121 faces the pressure relief space 1113.

[0055] In this way, by providing the support structure 1114 in the first support 111, the valve port of the first explosion-proof valve 121 faces the pressure relief space 1113 formed by the support structure 1114 and the electric core 12, so that the material sprayed from the first explosion-proof valve 121 can enter the pressure relief space 1113 and flow out of the housing assembly 10 to the outside in the case of thermal runaway of the electric core 12. Without increasing the material cost, process difficulty, and volume and weight of the energy storage power supply 100, the pressure in the electric core 12 is timely reduced.

[0056] The energy storage power supply 100 is a device capable of storing electric energy, capable of being used as a mobile power supply, capable of storing a large amount of electric energy, and capable of efficiently delivering the stored electric energy to other electric devices. The energy storage power supply 100 comprises the battery cell 12, the busbar 17, the inverter 20 and the shell assembly 10. The battery cell 12 can provide electric energy, and the busbar 17 can connect the positive electrode 123 and the negative electrode 124 of the plurality of battery cells 12. The inverter 20 can be a converter capable of converting direct current and fixed frequency and fixed voltage or frequency and voltage alternating current into each other, for example, the inverter 20 can convert direct current (such as batteries, storage batteries, etc.) into alternating current, or convert alternating current into direct current, or convert low voltage into high voltage, or convert high voltage into low voltage.

[0057] The battery pack (not marked in the figure) comprises the battery cell 12, the busbar 17 and the shell assembly 10. The busbar 17 can connect the positive electrode 123 and the negative electrode 124 of the plurality of battery cells 12, so that the battery pack can expand the electric energy capacity of the energy storage power supply 100 when the battery pack is connected to the energy storage power supply 100 through the power supply line or the battery pack is connected to the energy storage power supply 100 through plugging.

[0058] Specifically, the shell assembly 10 comprises the shell 11. The shell 11 comprises a first shell and a second shell, and the first shell can be connected to the second shell. For example, the first shell can be connected to the second shell by bolts, or the first shell can be connected to the second shell by buckles. The shell 11 is in the shape of a cylinder, so that the shell 11 can form a containing cavity 112, which can be used to contain the battery cell 12 and other structures.

[0059] A first support 111 is arranged on the inner wall of the containing cavity 112, that is, the bottom wall of the shell 11. The first support 111 can be used to fix the battery cell 12. The first support 111 is provided with a support structure 1114, which can be a protrusion arranged on the inner wall of the containing cavity 112, for example, the support structure 1114 can be a plane protruding from the inner wall of the containing cavity 112 or a rib protruding from the inner wall of the containing cavity 112, so that the support structure 1114 can be used to support the battery cell 12, and one end of the battery cell 12 can be arranged spaced apart from the inner wall of the containing cavity 112, so that a pressure relief space 1113 can be formed between the battery cell 12 and the inner wall of the containing cavity 112. The pressure relief space 1113 can communicate with the containing cavity 112, and the containing cavity 112 communicates with the outside of the shell 11, so that the pressure relief space 1113 can be used to drain the substances entering the pressure relief space 1113 and drain the substances out of the energy storage power supply 100.

[0060] The battery cell 12 can be used to store and output electrical energy when needed by converting electrical energy into chemical energy for storage and re-converting chemical energy into electrical energy for release when needed. The battery cell 12 can be mounted on the first support 111 so that the battery cell 12 is fixed.

[0061] The battery cell 12 is provided with a first explosion-proof valve 121 on the end face close to the first support 111, and the distance between the first explosion-proof valve 121 and the inner wall of the accommodating cavity 112 is greater than or equal to 2 mm, so that a pressure relief space 1113 can be formed between the first explosion-proof valve 121 and the inner wall of the accommodating cavity 112, and the pressure relief space 1113 can enable the substances sprayed out of the battery cell 12 to quickly flow into the accommodating cavity 112 to achieve the purpose of rapid pressure relief.

[0062] The valve port of the first explosion-proof valve 121 can face the pressure relief space 1113, and the first explosion-proof valve 121 is arranged to avoid the support structure 1114, so that the first explosion-proof valve 121 can be prevented from being blocked by the support structure 1114, and the substances sprayed out of the first explosion-proof valve 121 can flow into the pressure relief space 1113. The first explosion-proof valve 121 is provided with a weak position or a weak device inside, and when the pressure of the battery cell 12 rises, the weak position will be blown off by the pressure, so as to release the pressure of the battery cell 12, thereby preventing the battery cell 12 from exploding or catching fire due to abnormal conditions such as overcharging, overdischarging, short circuit, etc.

[0063] Please refer to FIG. 2, in some embodiments, the first support 111 is integrally formed with the shell 11.

[0064] In this way, by integrally forming the first support 111 with the shell 11, the battery cell 12 can be fixed with the shell 11, thereby realizing a module-free fixing structure, and the shell assembly 10 does not need to reserve a module mounting space, thereby reducing the volume of the energy storage power supply 100 and improving the energy density of the energy storage power supply 100, so as to reduce the product volume, weight and cost.

[0065] Specifically, the first support 111 and the shell 11 can be made by an integral forming manufacturing process. For example, when the first support 111 and the shell 11 are made of metal material, the first support 111 and the shell 11 can be made by sand casting, pressure casting or gas pressure casting, i.e. the molten metal or alloy is injected into a pre-made mold, and after solidification and cooling, the first support 111 and the shell 11 are formed; when the first support 111 and the shell 11 are made of plastic material, the molten plastic material is injected into the mold under high pressure, and after cooling and solidification, the first support 111 and the shell 11 with the required shape and size are obtained.

[0066] Therefore, instead of assembling the battery cells 12 into modules, and then installing the plurality of modules into the housing assembly 10 to form a three-level assembly mode of "battery cell 12-module-housing assembly 10", the battery cells 12 are directly integrated into the housing assembly 10, simplifying the assembly process, thereby significantly simplifying the structure of the housing assembly 10, improving the space utilization, and further improving the energy density of the battery and reducing the cost.

[0067] Referring to FIG. 2, in some embodiments, the first support 111 includes a fixed portion 1111, and the fixed portion 1111 is provided with a first fixed slot 1112 for fitting with one end of the battery cell 12, and the support structure 1114 is arranged in the first fixed slot 1112.

[0068] In this way, by opening the first fixed slot 1112 on the fixed portion 1111 of the first support 111, the one end of the battery cell 12 can be fixed with the first fixed slot 1112 to prevent the battery cell 12 from moving. By abutting the support structure 1114 with the battery cell 12, the battery cell 12 can be further fixed.

[0069] Specifically, the first support 111 includes a fixed portion 1111, and the fixed portion 1111 protrudes from the inner wall of the housing 11, and the fixed portion 1111 is formed with a first fixed slot 1112, and the shape and size of the first fixed slot 1112 are adapted to the shape and size of the end face of the battery cell 12. For example, when the battery cell 12 is a cylinder, the shape of the first fixed slot 1112 is a circular groove; when the battery cell 12 is a quadrangular prism, the shape of the first fixed slot 1112 is a rectangle. And the position of the first fixed slot 1112 on the first support 111 corresponds to the position of the battery cell 12, so that one end of the battery cell 12 can be fitted with the first fixed slot 1112, and the fixed portion 1111 can be used to fix the battery cell 12. The support structure 1114 can be arranged in the first fixed slot 1112, so that the battery cell 12 extending into the first fixed slot 1112 can be abutted by the support structure 1114, so that the battery cell 12 is further fixed.

[0070] The number of first fixed slots 1112 is adapted to the number of battery cells 12, so that the pressure relief space 1113 can communicate with the plurality of first fixed slots 1112 arranged in an array, so that the material sprayed from the first explosion-proof valve 121 can flow into the pressure relief space 1113.

[0071] Referring to FIGS. 2 and 3, in some embodiments, the side wall of the first fixed slot 1112 is provided with an opening 11121, and the pressure relief space 1113 communicates with the accommodating cavity 112 through the opening 11121.

[0072] Thus, by opening the opening 11121 on the sidewall of the first fixed groove 1112, the pressure relief space 1113 is communicated with the containing cavity 112, so that the substances sprayed out of the battery cell 12 can be guided out of the first fixed groove 1112 to achieve the purpose of pressure relief.

[0073] Specifically, the sidewall of the first fixed groove 1112 is provided with an opening 11121, which can communicate the pressure relief space 1113 and the containing cavity 112, so that the substances in the pressure relief space 1113 can enter the containing cavity 112. The number of openings 11121 can be multiple, for example, the number of openings 11121 can be 2 or 4, and multiple openings 11121 can be symmetrically opened on the sidewall of the first fixed groove 1112.

[0074] Please refer to FIG. 4, in some embodiments, the sidewall of the first fixed groove 1112 forms a gap 1116 with the sidewall of the battery cell 12, and the pressure relief space 1113 is communicated with the containing cavity 112 through the gap 1116.

[0075] Thus, by forming a gap 1116 between the sidewall of the first fixed groove 1112 and the sidewall of the battery cell 12, the substances sprayed out of the battery cell 12 can flow from the gap 1116 to the containing cavity 112 to achieve the purpose of pressure relief.

[0076] Specifically, the diameter of the battery cell 12 can be adapted to the size of the diameter of the first fixed groove 1112, so that the sidewall of the first fixed groove 1112 forms a gap 1116 with the sidewall of the battery cell 12, and the pressure relief space 1113 is communicated with the containing cavity 112 through the gap 1116, so that the substances sprayed out of the battery cell 12 into the pressure relief space 1113 can flow into the containing cavity 112 from the gap 1116.

[0077] In some embodiments, please refer to FIG. 5, the first fixed groove 1112 is provided with a special-shaped pressure relief groove 1117 along the direction of the groove, the pressure relief groove 1117 is located between the battery cell 12 and the sidewall of the first fixed groove 1112, and the pressure relief groove 1117 can be communicated with the containing cavity 112, and the substances sprayed out of the battery cell 12 into the pressure relief space 1113 can flow into the containing cavity 112 from the pressure relief groove 1117.

[0078] Please refer to FIG. 6, in some embodiments, the fixed part 1111 is provided with a plurality of first fixed grooves 1112 arranged side by side, the support structure 1114 includes two convex ribs 11141, which penetrate through the plurality of first fixed grooves 1112 and form a guide channel 11142, the valve port of the first explosion-proof valve 121 faces the guide channel 11142 and is communicated with the containing cavity 112 through the guide channel 11142.

[0079] In this way, the plurality of first fixing grooves 1112 are arranged on the fixing portion 1111 in parallel, so that the plurality of battery cells 12 can be fixed, and the space utilization is improved. By forming the guide channel 11142 by the support structure 1114, and directing the valve port of the first explosion-proof valve 121 towards the guide channel 11142, the material sprayed out of the battery cell 12 can enter the containing cavity 112 from the guide channel 11142, so as to achieve the purpose of pressure relief.

[0080] Specifically, the plurality of first fixing grooves 1112 are arranged on the fixing portion 1111 in parallel, for example, the first fixing grooves 1112 can be arranged in an array in the containing cavity 112. The support structure 1114 includes two parallel convex ribs 11141, which can penetrate through the plurality of first fixing grooves 1112, so as to form the guide channel 11142, which is in communication with the containing cavity 112. The valve port of the first explosion-proof valve 121 of the battery cell 12 is directed towards the guide channel 11142, so that the material sprayed out of the battery cell 12 can flow into the containing cavity 112 from the guide channel 11142.

[0081] Please refer to Fig. 3 again. In some embodiments, the first support 111 includes a plurality of fixed columns 1115 arranged at intervals, and the plurality of fixed columns 1115 form the first fixing grooves 1112 for fitting with one end of the battery cell 12, and the support structure 1114 is arranged on the fixed columns 1115.

[0082] In this way, by arranging the plurality of fixed columns 1115 to enclose the first fixing grooves 1112, one end of the battery cell 12 can be fixed with the first fixing grooves 1112, so as to prevent the battery cell 12 from moving. The support structure 1114 is arranged on the fixed columns 1115, so that the battery cell 12 can be fixed while forming the pressure relief space 1113 to guide the pressure relief of the battery cell 12.

[0083] Specifically, the first support 111 includes a plurality of fixed columns 1115 arranged at intervals, and the shape of the fixed column 1115 is a quadrangular prism, and each edge surface is an arc surface, so that the first fixing grooves 1112 can be enclosed between the adjacent four fixed columns 1115. When one end of the battery cell 12 is inserted into the first fixing groove 1112, one end of the battery cell 12 can be fitted with the first fixing groove 1112.

[0084] The support structure 1114 is arranged on the edge surface of the fixed column 1115, i.e. on the inner wall of the first fixing groove 1112, so that the support structure 1114 can support one end of the battery cell 12 and form the pressure relief space 1113.

[0085] Referring to FIG. 2, FIG. 7 and FIG. 8, in some embodiments, the shell assembly 10 comprises a second support 14, the second support 14 is connected with the shell 11, one end of the battery cell 12 is connected with the first support 111, and the other end of the battery cell 12 is connected with the second support 14.

[0086] In this way, by connecting the second support 14 with the shell 11, the other end of the battery cell 12 is connected with the second support 14, so that the battery cell 12 can be further fixed by the second support 14, and the stability of the battery cell 12 in the shell assembly 10 is strengthened.

[0087] Specifically, the shell assembly 10 further comprises a second support 14, which can be used to fix the battery cell 12 and provide support for the inverter 20. The second support 14 can be connected with the shell 11, so that the second support 14 is fixed. For example, a first connecting column 113 is formed on the inner wall of the shell 11 towards the second support 14, and a second connecting column 143 is formed on the end surface of the second support 14 towards the shell 11, the first connecting column 113 and the second connecting column 143 can be connected by bolts, so that the shell 11 and the second support 14 are fixed.

[0088] One end of the battery cell 12 can be connected with the first support 111, and the other end of the battery cell 12 can be connected with the second support 14, so that the battery cell 12 can be fixed by the first support 111 and the second support 14.

[0089] Referring to FIG. 2, FIG. 8 and FIG. 9, in some embodiments, the first support 111 is provided with a first fixing groove 1112, and the second support 14 is provided with a second fixing groove 141, the first fixing groove 1112 is used to fit with one end of the battery cell 12, and the second fixing groove 141 is used to fit with the other end of the battery cell 12, the battery cell 12 comprises a second explosion-proof valve 122, the first explosion-proof valve 121 and the second explosion-proof valve 122 are respectively arranged on the two opposite sides of the battery cell 12, and the second support 14 is arranged to avoid the second explosion-proof valve 122.

[0090] In this way, by providing the second fixing groove 141 on the second support 14, the other end of the battery cell 12 can be fixed by the second fixing groove 141. By arranging the second explosion-proof valve 122 on the battery cell 12, and arranging the second explosion-proof valve 122 and the first explosion-proof valve 121 respectively on the two ends of the battery cell 12, the pressure relief of the battery cell 12 can be accelerated. By arranging the second support 14 to avoid the second explosion-proof valve 122, the second explosion-proof valve 122 can be prevented from being blocked.

[0091] Specifically, the second support 14 is provided with second fixing grooves 141, the shape, size and number of the second fixing grooves 141 are adapted to the shape, size and number of the battery cells 12. For example, when the battery cells 12 are cylindrical, the second fixing grooves 141 are circular grooves; when the battery cells 12 are quadrangular prisms, the second fixing grooves 141 are rectangular grooves; when the number of the battery cells 12 is 28, the number of the second fixing grooves 141 is 28. The positions of the second fixing grooves 141 are adapted to the positions of the battery cells 12, so that one end of the battery cell 12 can be fitted into the second fixing groove 141. By fitting the other end of the battery cell 12 into the first fixing groove 1112, the battery cell 12 can be fixed in the shell assembly 10.

[0092] The battery cell 12 is provided with a second explosion-proof valve 122 on the end face close to the second support 14, and the second explosion-proof valve 122 is arranged at the two ends of the battery cell 12 respectively. The second explosion-proof valve 122 is provided with a weak position or a weak device inside. When the pressure of the battery cell 12 rises, the weak position will be broken by the pressure, so as to release the pressure of the battery cell 12, to prevent the battery cell 12 from exploding or catching fire due to abnormal conditions such as overcharging, overdischarging and short circuit.

[0093] The second support 14 can be arranged to avoid the second explosion-proof valve 122, that is, in the case that the battery cell 12 is inserted into the second fixing groove 141, the second explosion-proof valve 122 needs to avoid being blocked by the second support 14, so that the substances generated by the battery cell 12 can be sprayed out of the second explosion-proof valve 122, and the battery cell 12 can be pressure released.

[0094] Please refer to FIG. 2 and FIG. 8 again, in some embodiments, the shell assembly 10 comprises a fixing seat 15, the fixing seat 15 is connected with the second support 14 and is arranged to be spaced apart from the battery cell 12, and a heat dissipation space 16 is formed between the fixing seat 15 and the second support 14.

[0095] In this way, by connecting the fixing seat 15 with the second support 14 and arranging the fixing seat 15 to be spaced apart from the battery cell 12, the heat dissipation space 16 can be formed, so that the substances sprayed out of the second explosion-proof valve 122 can enter the heat dissipation space 16.

[0096] Specifically, the shell assembly 10 further comprises a fixing seat 15, which can be used to fix and support the inverter 20. The fixing seat 15 can be connected with the second support 14, and the fixing seat 15 is arranged to be spaced apart from the battery cell 12, so that a heat dissipation space 16 is formed between the fixing seat 15 and the second support 14. For example, the second support 14 can be provided with a fixing pillar 144 on the end face away from the first support 110, the fixing pillar 144 protrudes from the end face of the second support 14, and the fixing pillar 144 can be connected with the fixing seat 15 by bolts. Therefore, the substances sprayed out of the second explosion-proof valve 122 can enter the heat dissipation space 16.

[0097] Referring to FIG. 2, FIG. 9 and FIG. 10, in some embodiments, the bottom surface of the second fixing groove 141 is provided with a through hole 142, the battery cell 12 includes a positive electrode 123 and a negative electrode 124, the through hole 142 is used for connecting the positive electrode 123 and the negative electrode 124 of the plurality of battery cells 12 through the through hole 142 by the busbar 17, and the busbar 17 is arranged to avoid the second explosion-proof valve 122.

[0098] In this way, by arranging the busbar 17 to connect the positive electrode 123 and the negative electrode 124 of the plurality of battery cells 12, the plurality of battery cells 12 can be connected in series, and the busbar 17 is arranged to avoid the second explosion-proof valve 122, so that the second explosion-proof valve 122 can be prevented from being blocked.

[0099] Specifically, the shell assembly 10 further includes a busbar 17, which is a sheet-shaped connecting piece made of conductive material and is used to connect the plurality of battery cells 12 to form an integrated conductive structure. For example, the busbar 17 can be made of conductive materials such as copper, aluminum, copper-aluminum alloy and aluminum-magnesium alloy. Thus, the busbar 17 can connect the positive electrode 123 and the negative electrode 124 of the plurality of battery cells 12, so that the plurality of battery cells 12 are connected in series or parallel to meet the voltage and capacity requirements of different shell assemblies 10.

[0100] The bottom surface of the second fixing groove 141 is provided with a through hole 142, and the through hole 142 can pass through the busbar 17, so that the busbar 17 can connect the positive electrode 123 and the negative electrode 124 of the adjacent battery cells 12.

[0101] In some embodiments, the positive electrode 123 and the negative electrode 124 of the battery cell 12 can protrude out of the through hole 142, so that the busbar 17 can be connected to the positive electrode 123 and the negative electrode 124 protruding out of the through hole 142.

[0102] The busbar 17 can be arranged to avoid the second explosion-proof valve 122. For example, after the battery cell 12 is inserted into the second fixing groove 141, the second explosion-proof valve 122 can spray the substance from the through hole 142 to the heat dissipation space 16, and the busbar 17 needs to avoid shielding the second explosion-proof valve 122 when connecting the positive electrode 123 and the negative electrode 124, so as to prevent the busbar 17 from blocking the second explosion-proof valve 122.

[0103] Referring to FIG. 7, FIG. 12, FIG. 13 and FIG. 14, in some embodiments, the angle formed 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 less than or equal to 10 degrees.

[0104] Therefore, after the installation position of the second explosion-proof valve 122 is determined, the installation position of the first explosion-proof valve 121 can be determined by making the included angle between the line connecting the first explosion-proof valve 121 and the second explosion-proof valve 122 and the vertical line passing through the second explosion-proof valve 122 less than or equal to 10 degrees, and the first explosion-proof valve 121 can be located in the pressure relief space 1113 to avoid being blocked.

[0105] Specifically, since the position of the valve port of the first explosion-proof valve 121 cannot be determined when the first explosion-proof valve 121 is inserted into the first fixed groove 1112, in order to avoid the first explosion-proof valve 121 being blocked, the positional relationship between the first explosion-proof valve 121 and the second explosion-proof valve 122 needs to be determined when the first explosion-proof valve 121 and the second explosion-proof valve 122 are opened on the battery cell 12, that is, the included angle between the line connecting the first explosion-proof valve 121 and the second explosion-proof valve 122 and the vertical line passing through the second explosion-proof valve 122 is less than or equal to 10 degrees, so that when the battery cell 12 is inserted into the second fixed groove 141, the position of the second explosion-proof valve 122 is determined by avoiding the second explosion-proof valve 122 from being arranged away from the busbar 17 and the second support 14, and the position of the first explosion-proof valve 121 is determined.

[0106] Please refer to FIG. 2 and FIG. 7 again, in some embodiments, the energy storage power supply 100 comprises a fan 30 located in the accommodation cavity 112, the fan 30 is used to supply air or exhaust air to the pressure relief space 1113, and the airflow direction formed by the fan 30 is the same as the extension direction of the guide channel 11142.

[0107] Therefore, by arranging the fan 30 in the accommodation cavity 112, the fan 30 can dissipate heat from the energy storage power supply 100.

[0108] Specifically, the energy storage power supply 100 further comprises a fan 30, the fan 30 is arranged in the accommodation cavity 112 and can supply air or exhaust air to the accommodation cavity 112. The fan 30 can be a blower fan 30 or an exhaust fan 30. When the fan 30 is a blower fan 30, the fan 30 can supply air to the accommodation cavity 112, so that the airflow can enter the pressure relief space 1113 and dissipate heat from the battery cell 12 through the pressure relief space 1113. When the fan 30 is an exhaust fan 30, the fan 30 can exhaust air to the accommodation cavity 112, so that a negative pressure is formed in the accommodation cavity 112 and a positive pressure is formed outside the energy storage power supply 100, so that the airflow enters the pressure relief space 1113 under the control of the pressure difference and dissipates heat from the battery cell 12 through the pressure relief space 1113.

[0109] In some embodiments, the number of the air blower 30 can be multiple. For example, when the number of the air blower 30 is two, one of the air blowers 30 can blow air into the accommodating cavity 112, and the other air blower 30 can suck air out of the accommodating cavity 112, and the air flow direction formed by the air blower 30 is the same as the extension direction of the guide channel 11142, so that the air flow can be driven to move in the accommodating cavity 112, and the air flow enters the pressure relief space 1113 to dissipate heat for the battery cell 12.

[0110] In some embodiments, the two air blowers 30 are both air blowers 30, and blow air in the same direction in the accommodating cavity 112, so that the air flow direction formed by the air blower 30 is the same as the extension direction of the guide channel 11142, so that the air flow enters the pressure relief space 1113 to dissipate heat for the battery cell 12.

[0111] Referring to FIGS. 1, 2 and 7, in some embodiments, the energy storage power supply 100 includes a ventilation structure 13, and the accommodating cavity 112 is communicated with the outside through the ventilation structure 13.

[0112] In this way, the ventilation structure 13 is arranged to enable the accommodating cavity 112 to communicate with the outside, so that the substances sprayed out of the battery cell 12 can be discharged from the accommodating cavity 112 to the outside to achieve the purpose of pressure relief.

[0113] Specifically, the energy storage power supply 100 includes a ventilation structure 13, which can be a ventilation sheet, and the ventilation structure 13 can be used to guide or increase the air circulation inside the energy storage power supply 100 to dissipate heat for the energy storage power supply 100. The ventilation structure 13 is arranged on the first housing, or the ventilation structure 13 can be arranged on the second housing, and the ventilation structure 13 can also be arranged on both the first housing and the second housing. The number of the ventilation structure 13 can be multiple. For example, when the number of the ventilation structure 13 is two, the ventilation structure 13 can be arranged on the opposite sides of the energy storage power supply 100; when the number of the ventilation structure 13 is four, the ventilation structure 13 can be arranged on the circumferential side of the energy storage power supply 100.

[0114] The ventilation structure 13 can form a ventilation hole 131, the ventilation hole 131 can communicate the inside of the housing assembly 10 with the outside of the housing assembly 10, and the pressure relief space 1113 can communicate with the ventilation hole 131, so that the substances sprayed out of the first explosion-proof valve 121 of the battery cell 12 can flow into the pressure relief space 1113 and then flow out of the housing assembly 10 from the ventilation hole 131.

[0115] In the description of the specification, reference to "one embodiment", "some embodiments", "certain embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in certain embodiments", "in an example", "in a specific example", or "in some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0116] Although embodiments of the application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made hereto without departing from the principles and scope of the application, which is defined by the following claims and their equivalents.

Claims

1. A housing assembly, wherein, The shell assembly comprises: The shell is provided with a containing cavity, an inner wall of the containing cavity is provided with a first support, the first support is used for mounting an electric core, the electric core is provided with a first explosion-proof valve, the first support is provided with a support structure, the support structure is used for supporting the electric core, and a distance is formed between the first explosion-proof valve and the inner wall of the containing cavity to form a pressure relief space, the pressure relief space is communicated with the containing cavity, and a valve port of the first explosion-proof valve faces the pressure relief space.

2. The housing assembly of claim 1, wherein, The first support is integrally formed with the shell.

3. The housing assembly of claim 1 or 2, wherein, The first support comprises a fixed part, the fixed part is provided with a first fixed groove, the first fixed groove is used for fitting one end of the electric core, and the support structure is arranged in the first fixed groove.

4. The housing assembly of claim 3, wherein, An opening is arranged on a side wall of the first fixed groove, and the pressure relief space is communicated with the containing cavity through the opening.

5. The housing assembly of claim 3, wherein, A gap is formed between a side wall of the first fixed groove and a side wall of the electric core, and the pressure relief space is communicated with the containing cavity through the gap.

6. The housing assembly of claim 3, wherein, The fixed part is provided with a plurality of first fixed grooves arranged side by side, the support structure comprises two convex ribs, the two convex ribs pass through the plurality of first fixed grooves and form a guide channel, the valve port of the first explosion-proof valve faces the guide channel and is communicated with the containing cavity through the guide channel.

7. The housing assembly of claim 1, wherein, The first support comprises a plurality of fixed columns arranged at intervals, the plurality of fixed columns form a first fixed groove, the first fixed groove is used for fitting one end of the electric core, and the support structure is arranged on the fixed column.

8. The housing assembly of any one of claims 1-7, wherein, The distance between the first explosion-proof valve and the inner wall of the containing cavity is greater than or equal to 2 mm.

9. The housing assembly of any of claims 1-8, wherein, The first explosion-proof valve is arranged away from the support structure.

10. The housing assembly of any one of claims 1-9, wherein, The support structure is a protrusion arranged protruding from the inner wall of the containing cavity.

11. The housing assembly of claim 1, wherein, The shell assembly comprises a second support, the second support is connected with the shell, one end of the electric core is connected with the first support, and the other end of the electric core is connected with the second support.

12. The housing assembly of claim 11, wherein, The first support is provided with a first fixed groove, the second support is provided with a second fixed groove, the first fixed groove is used for fitting one end of the electric core, the second fixed groove is used for fitting the other end of the electric core, the electric core comprises a second explosion-proof valve, the first explosion-proof valve and the second explosion-proof valve are arranged on opposite sides of the electric core respectively, and the second support is arranged away from the second explosion-proof valve.

13. The housing assembly of claim 12, wherein, A through hole is arranged on a bottom surface of the second fixed groove, the electric core comprises a positive electrode and a negative electrode, the through hole is used for connecting the positive electrodes and the negative electrodes of a plurality of electric cores through a busbar passing through the through hole, and the busbar is arranged away from the second explosion-proof valve.

14. A battery pack, wherein, The energy storage power supply comprises the electric core and the shell assembly.

15. An energy storage power supply, wherein, The energy storage power supply comprises the electric core and the shell assembly, and an inverter is electrically connected with the electric core.

16. The energy storage power supply of claim 15, wherein, The energy storage power supply comprises a fan arranged in the containing cavity, the shell assembly comprises a guide channel, the fan is used for air supply or air exhaust to the guide channel, and the fan forms an airflow direction same as an extension direction of the guide channel.

17. The energy storage power source of claim 15, wherein, The energy storage power supply comprises a ventilation structure, and the accommodating cavity is communicated with the outside through the ventilation structure.

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