Box, battery and power-using device

Abstract

The present application provides a box, a battery and an electrical device, which belongs to the field of battery technology. Among them, the box includes a box body and two cover plates. Two accommodating cavities arranged along a preset direction are formed inside the box body, and the accommodating cavities are used to accommodate battery cells. In the preset direction, the two accommodating cavities form openings on both sides of the box body respectively. The two cover plates are used to cover the openings of the two accommodating cavities respectively. The box body adopts this structure to facilitate the maintenance and replacement of the battery cells in the two accommodating cavities in the later stage, and by respectively arranging the openings of the two accommodating cavities on both sides of the box body in the preset direction, the battery cells can be respectively assembled into the two accommodating cavities through the openings on both sides of the box body, so that the structure of the box will not be limited by the assembly of the battery cells, which is conducive to improving the structural strength of the box, so as to enhance the box's anti-extrusion and anti-shear capabilities, and thus can effectively reduce the potential safety hazards of the battery during use.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a box, a battery and an electrical device. Background Art

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. Especially for new energy vehicles powered by lithium batteries, the battery consists of a box and a plurality of battery cells contained in the box. As the core components of new energy vehicles, the battery has high requirements in terms of cost and safety. At present, in order to improve the endurance of new energy vehicles, the battery is usually set as a stacked power battery in the prior art to increase the capacity of the battery cells. However, the existing stacked power battery is not easy to assemble and disassemble, resulting in low production and assembly efficiency and later maintenance efficiency of the battery, and the structural strength of the battery is poor, so that the battery has insufficient shear resistance in impact conditions, which leads to greater safety hazards in the use of the battery. Summary of the invention

[0003] The embodiments of the present application provide a box, a battery, and an electrical device, which can effectively reduce the potential safety hazards of the battery during use.

[0004] In a first aspect, an embodiment of the present application provides a box body, comprising a box body and two cover plates; the interior of the box body is formed with two accommodating cavities arranged along a preset direction, the accommodating cavities are used to accommodate battery cells, and in the preset direction, the two accommodating cavities respectively form openings on both sides of the box body; the two cover plates are respectively used to cover the openings of the two accommodating cavities.

[0005] In the above technical solution, two accommodating cavities arranged along a preset direction are provided in the box body, and the openings of the two accommodating cavities are respectively located on both sides of the box body in the preset direction, so that after the two cover plates are covered on the corresponding openings, a stacked battery design is formed. The box body with such a structure is convenient for assembling the battery monomers in the two accommodating cavities on the one hand, and is convenient for repairing and replacing the battery monomers in the two accommodating cavities in the later stage, which is beneficial to improving the production assembly efficiency and later maintenance efficiency of the battery. On the other hand, by respectively arranging the openings of the two accommodating cavities on both sides of the box body in the preset direction, the battery monomers can be respectively assembled into the two accommodating cavities through the openings on both sides of the box body, so that the structure of the box body will not be limited by the assembly of the battery monomers, and there is no need to set the box body as a two-layer detachable structure in the preset direction, which is beneficial to improving the overall structural strength of the box body itself, so as to enhance the box body's anti-extrusion ability and anti-shearing ability under impact conditions, thereby effectively reducing the safety hazards of the battery during use.

[0006] In some embodiments, the box body includes a connecting member and two first frames; the two first frames are respectively connected to the two sides of the connecting member in the preset direction, each first frame and the connecting member together form a accommodating cavity, and the first frame forms the opening on the side away from the connecting member in the preset direction.

[0007] In the above technical solution, by respectively connecting the two first frames to the two sides of the connecting piece in a preset direction, so that the connecting piece and the two first frames form two accommodating cavities respectively, the box body adopting this structure is easy to produce and manufacture, and there is no need to set the box body as an integrally formed structure, which is beneficial to reduce the manufacturing difficulty and manufacturing cost of the box body.

[0008] In some embodiments, the connecting member includes a second frame and a separator; the second frame is respectively connected to the two first frames at both ends in the preset direction; the separator is fixed to the inner side of the second frame, and the separator is used to separate the two accommodating cavities.

[0009] In the above technical solution, the connecting member includes two parts, namely, a second frame and a separator. By connecting the separator to the inner side of the second frame, the separator can separate two accommodating chambers. In addition, the two first frames are respectively connected to the two ends of the second frame in a preset direction, so that the two first frames are connected to the two sides of the separator in a preset direction. The connecting member with such a structure makes the joint between the first frame and the second frame have a distance from the separator in the preset direction, so that the joint between the first frame and the second frame can effectively avoid the corner between the second frame and the separator, thereby facilitating the connection of the first frame to the second frame, thereby helping to reduce the difficulty of connecting the first frame and the second frame, and helping to improve the connection strength between the first frame and the second frame.

[0010] In some embodiments, the second frame is welded to the first frame.

[0011] In the above technical solution, welding is used to achieve the connection between the first frame and the second frame to improve the connection strength between the first frame and the second frame, thereby improving the structural strength of the box body itself, which is beneficial to enhancing the impact resistance and shear resistance of the box in an impact environment.

[0012] In some embodiments, an inner wall of the second frame body is protruded toward the separator to form a connecting portion, and the connecting portion is connected to the separator.

[0013] In the above technical solution, a connecting portion is protrudingly provided on the inner wall of the second frame facing the separator, so that the outer peripheral wall of the separator can be connected to the second frame through the connecting portion. The connector with this structure makes the seam between the separator and the connecting portion have a distance from the second frame in the extension direction of the separator, so that the seam between the separator and the connecting portion can effectively avoid the corner between the connecting portion and the second frame, thereby facilitating the connection of the separator to the second frame, which is beneficial to reducing the difficulty of connecting the separator and the second frame, and is beneficial to improving the connection strength between the separator and the second frame.

[0014] In some embodiments, the separator has a thermal management region for regulating the temperature of the battery cells.

[0015] In the above technical solution, the separator is used to adjust the thermal management area of ​​the battery cell to reduce the temperature of the battery cell in the box, thereby effectively alleviating the safety hazard caused by the temperature rise of the battery cell of the battery with such a box. In addition, by setting the thermal management area on the separator, the battery cells in the two accommodating cavities can share the thermal management area, which is conducive to reducing the manufacturing cost of the box, and is conducive to streamlining the structure of the box and reducing the manufacturing difficulty.

[0016] In some embodiments, a heat conductive member is disposed in each of the two accommodating cavities; the heat conductive member is used to be disposed between the battery cell and the separator, and the heat conductive member covers at least a portion of the thermal management area.

[0017] In the above technical solution, a heat conductor is arranged between the battery cell and the separator, and the heat conductor covers at least a portion of the thermal management area, so that the heat conductor can transfer the heat of the battery cell to the thermal management area, thereby effectively improving the thermal conductivity between the battery cell and the thermal management area, thereby facilitating the thermal management area to regulate the temperature of the battery cell, and is beneficial to improving the thermal management area's regulation efficiency of the battery cell temperature.

[0018] In some embodiments, a first weight-reducing cavity is defined in at least one of the two first frames; and / or a second weight-reducing cavity is defined in the connecting member.

[0019] In the above technical solution, by opening a first weight-reducing cavity in the first frame or opening a second weight-reducing cavity in the connecting piece, it is helpful to reduce the weight of the box body while ensuring the overall structural strength of the box body, thereby reducing the weight of the battery having such a box body for easy transportation and use.

[0020] In some embodiments, the thickness of the cover plate located at the bottom of the box body is greater than the thickness of the cover plate located at the top of the box body.

[0021] In the above technical solution, by setting the thickness of the cover plate located at the bottom of the box body to be greater than the other cover plate, the structural strength of the cover plate located at the bottom of the box body is improved, which is beneficial to improve the bearing capacity of the cover plate located at the bottom of the box body for the battery cells in the accommodating cavity, so as to reduce the risk of deformation or damage of the cover plate located at the bottom of the box body during later use.

[0022] In some embodiments, the cover plate of the two cover plates located at the bottom of the box body has a side facing the accommodating cavity with abutment surface for the battery cell to abut.

[0023] In the above technical solution, by setting the side of the cover plate located at the bottom of the box body facing the accommodating cavity as a plane, the cover plate located at the bottom of the box body can provide better support and protection for the battery cells in the accommodating cavity, which is beneficial to reduce the collision damage between the battery cells and the cover plates during later use.

[0024] In a second aspect, an embodiment of the present application further provides a battery, comprising a battery cell and the above-mentioned box; the box is used to accommodate the battery cell.

[0025] In some embodiments, the battery cell has a first end and a second end opposite to each other in the preset direction; the first end is used to output current; and the second end is used to be arranged facing the bottom wall of the accommodating cavity.

[0026] In the above technical solution, by arranging the second end of the battery cell to face the bottom wall of the accommodating cavity of the box body, that is, the battery cells in the two accommodating cavities are arranged with their backs to the bottom wall of the accommodating cavity, the battery adopting this structure is convenient for assembling the battery cells in the two accommodating cavities on the one hand, and on the other hand, the battery cells in the two accommodating cavities can share a thermal management area, which is beneficial to saving the manufacturing cost of the battery.

[0027] In a third aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0030] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0031] Figure 3 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0032] Figure 4 A cross-sectional view of a battery provided for some embodiments of the present application;

[0033] Figure 5 A cross-sectional view of a box provided for some embodiments of the present application;

[0034] Figure 6 for Figure 5 A partial enlarged view of point A of the box is shown.

[0035] Icons: 1000-vehicle; 100-battery; 10-housing; 11-housing body; 111-accommodating chamber; 112-first frame; 1121-first weight-reducing chamber; 113-connecting piece; 1131-second frame; 1131a-connecting part; 1132-separator; 1132a-cooling channel; 1133-second weight-reducing chamber; 114-heat conducting piece; 12-cover; 121-resting plane; 20-battery cell; 200-controller; 300-motor; X-preset direction. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0038] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0042] The term "plurality" used in the present application refers to two or more (including two).

[0043] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0044] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0045] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0046] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0047] Lithium-ion batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are one of the most widely used batteries in the world today and an important part of the development of new energy. With the continuous development of lithium-ion battery technology, higher requirements are also put forward for the safety performance of lithium-ion batteries. Among them, the box has an important influence on the safety performance of the battery. The structural strength of the box determines the safety performance of the battery during use.

[0048] The inventors found that, in order to improve the endurance of new energy vehicles, the battery is usually set as a stacked power battery to increase the capacity of battery cells. However, in the stacked power battery, the impact resistance and extrusion resistance of the box are greatly challenged. In the prior art, in order to realize the stacked design of the battery, the battery cells are usually first arranged in the upper box and the lower box respectively, and then the upper box is overlapped on the opening of the lower box, and finally the upper box and the lower box are connected by bolts, so as to meet the stacked design of the battery. However, on the one hand, the assembly and disassembly of the box with this structure is relatively complicated, which is not convenient for production assembly and later disassembly, and is not conducive to improving production efficiency and later maintenance efficiency. On the other hand, in order to reserve space for the installation of the bolts, it is necessary to set an avoidance space in the upper box so that there are weak points in the upper box, thereby weakening the strength of the upper box itself, thereby reducing the anti-extrusion ability of the battery. Moreover, since the upper box and the lower box are connected by bolts, the installation space of the bolts is limited, and larger bolts cannot be selected, resulting in insufficient shear resistance of the battery under impact, which makes the battery prone to explosion risks during collision, resulting in greater safety hazards during use of the battery.

[0049] Based on the above considerations, in order to solve the problem of major safety hazards during the use of batteries, the inventors have designed a box body after in-depth research. The box body is provided with a box body and two cover plates. The interior of the box body has two accommodating cavities arranged along a preset direction, and the openings of the two accommodating cavities are respectively arranged on both sides of the box body in the preset direction, and the two cover plates respectively cover the openings of the two accommodating cavities.

[0050] The box body adopts this structure, by respectively covering the two cover plates on the openings on both sides of the box body, on the one hand, it is convenient to assemble the battery cells into the accommodating cavity during the production process, thereby helping to improve the production efficiency of the battery; on the other hand, when the battery cells in the accommodating cavity need to be repaired or replaced at a later stage, it is only necessary to open the corresponding cover plate, thereby facilitating the disassembly and maintenance of the battery at a later stage. The operation process is simple, which is conducive to improving the efficiency of later maintenance.

[0051] In addition, during use, by arranging the openings of the two accommodating cavities on both sides of the box body in a preset direction, the battery cells can be assembled into the two accommodating cavities through the openings on both sides of the box body, so that the structure of the box body will not be limited by the assembly of the battery cells, and there is no need to arrange the box body as a detachable structure with upper and lower layers. In other words, the bolt connection between the upper and lower layers of the box body is eliminated, and there is no need to arrange an avoidance space on the box body, which is beneficial to improve the overall structural strength of the box body, so as to enhance the anti-extrusion ability of the stacked battery and the anti-shear ability between the upper and lower layers of the stacked battery under impact, and further helps to reduce the potential safety hazards of the battery during use.

[0052] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the box and battery disclosed in the present application can be used to form the electrical device, which is helpful to alleviate the safety hazards of the battery during use.

[0053] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0054] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0055] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0056] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0057] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a battery 100 provided in some embodiments of the present application. Figure 3 The structure of the battery 100 provided in some embodiments of the present application is exploded. The battery 100 includes a box body 10 and a battery cell 20. The box body 10 is used to accommodate the battery cell 20.

[0058] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0059] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0060] According to some embodiments of the present application, referring to Figure 3 , and please refer to Figure 4 and Figure 5 , Figure 4 A cross-sectional view of a battery 100 provided in some embodiments of the present application, Figure 5 The present invention provides a cross-sectional view of a box 10 according to some embodiments of the present invention. The present invention provides a box 10, which includes a box body 11 and two cover plates 12. Two accommodating cavities 111 arranged along a preset direction X are formed inside the box body 11. The accommodating cavities 111 are used to accommodate battery cells 20. In the preset direction X, the two accommodating cavities 111 form openings on both sides of the box body 11. The two cover plates 12 are used to cover the openings of the two accommodating cavities 111, respectively.

[0061] Among them, the preset direction X is the thickness direction of the box body 11, and two accommodating cavities 111 arranged along the preset direction X are formed inside the box body 11, that is, two accommodating cavities 111 for accommodating battery cells 20 are formed inside the box body 11, and the two accommodating cavities 111 are arranged at intervals in the preset direction X.

[0062] Optionally, the cover plate 12 is detachably connected to one side of the box body 11 in the preset direction X to cover the opening of the corresponding accommodating cavity 111, so as to facilitate the quick removal and installation of the cover plate 12, so as to facilitate the replacement or maintenance of the battery cell 20 disposed in the accommodating cavity 111 in later use. Exemplarily, the cover plate 12 is screwed to the box body 11 by bolts. In other embodiments, the cover plate 12 can also be detachably connected to the box body 11 by means of snap connection or buckle connection.

[0063] By setting two accommodating cavities 111 arranged along a preset direction X in the box body 11, and the openings of the two accommodating cavities 111 are respectively located on both sides of the box body 11 in the preset direction X, so that the two cover plates 12 cover the corresponding openings, a stacked battery 100 design is formed. The box body 10 adopting this structure is convenient for assembling the battery cells 20 in the two accommodating cavities 111, and is convenient for repairing and replacing the battery cells 20 in the two accommodating cavities 111 in the later stage, which is beneficial to improving the production assembly efficiency and later maintenance efficiency of the battery 100. On the other hand, by respectively arranging the openings of the two accommodating cavities 111 on both sides of the box body 11 in the preset direction X, the battery cells 20 can be respectively assembled into the two accommodating cavities 111 through the openings on both sides of the box body 11, so that the structure of the box body 11 will not be limited by the assembly of the battery cells 20, and there is no need to arrange the box body 11 as a two-layer detachable structure in the preset direction X, which is beneficial to improving the overall structural strength of the box body 11 itself, so as to enhance the anti-extrusion ability and the anti-shearing ability of the box body 10 in the impact state, thereby effectively reducing the potential safety hazards of the battery 100 during use.

[0064] According to some embodiments of this application, please refer to Figure 5 The box body 11 includes a connecting member 113 and two first frames 112. The two first frames 112 are respectively connected to the two sides of the connecting member 113 in the preset direction X, each first frame 112 and the connecting member 113 together form a receiving cavity 111, and the first frame 112 forms an opening on one side away from the connecting member 113 in the preset direction X.

[0065] Each cover plate 12 is connected to one end of a first frame 112 away from the connecting member 113 in a preset direction X, so that the cover plate 12 covers the corresponding opening. Exemplarily, the first frame 112 can be an integral structure or a split structure. When the first frame 112 is an integral structure, the first frame 112 is formed into an annular structure extending along the circumference of the connecting member 113 through an integral molding process; when the first frame 112 is a split structure, the first frame 112 is formed into an annular structure extending along the circumference of the connecting member 113 by welding a plurality of plate-like structures end to end in sequence.

[0066] It should be noted that the structure of the box body 11 can be various, and the box body 11 can be a split structure, such as Figure 5 As shown, the box body 11 is connected by a connecting piece 113 and two first frames 112. The box body 11 can also be an integrated structure, that is, the box body 11 is integrally formed through a casting process, etc., and two accommodating cavities 111 arranged along a preset direction X are formed in the box body 11.

[0067] By connecting the two first frames 112 to the two sides of the connecting piece 113 in the preset direction X, so that the connecting piece 113 and the two first frames 112 respectively form two accommodating cavities 111, the box body 11 with this structure is easy to produce and manufacture, and there is no need to set the box body 11 as an integrally formed structure, which is beneficial to reduce the manufacturing difficulty and manufacturing cost of the box body 11.

[0068] According to some embodiments of this application, please continue to refer to Figure 5 The connecting member 113 includes a second frame 1131 and a separator 1132 . The two ends of the second frame 1131 in the preset direction X are respectively connected to the two first frames 112 . The separator 1132 is fixed to the inner side of the second frame 1131 , and is used to separate the two accommodating chambers 111 .

[0069] The connector 113 includes a second frame 1131 and a separator 1132. The separator 1132 is connected to the inner side of the second frame 1131 so that the separator 1132 can separate two accommodating chambers 111. The second frame 1131 is an annular structure extending along the circumference of the separator 1132, and the height direction of the second frame 1131 extends along the second direction, so that the two first frames 112 can be connected to the two ends of the second frame 1131 in the preset direction X.

[0070] Exemplarily, the second frame 1131 may have a variety of structures, such as an integrated structure or a split structure. When the second frame is an integrated structure, the second frame 1131 is formed into an annular structure extending along the circumference of the separator 1132 by an integrated molding process; when the second frame 1131 is a split structure, the second frame 1131 is formed into an annular structure extending along the circumference of the separator 1132 by welding a plurality of plate-like structures end to end in sequence.

[0071] Optionally, the separator 1132 is a plate-like structure, and the separator 1132 may be formed by welding a plurality of plate-like structures, or may be an integrated structure.

[0072] The box body 11 adopting this structure connects the two first frames 112 to the two ends of the second frame 1131 in the preset direction X, so as to realize that the two first frames 112 are connected to the two sides of the partition 1132 in the preset direction X. The connecting piece 113 adopting this structure makes the joint between the first frame 112 and the second frame 1131 have a distance from the partition 1132 in the preset direction X, so that the joint between the first frame 112 and the second frame 1131 can effectively avoid the corner between the second frame 1131 and the partition 1132, thereby facilitating the connection of the first frame 112 to the second frame 1131, which is beneficial to reduce the difficulty of connecting the first frame 112 and the second frame 1131, and is beneficial to improve the connection strength between the first frame 112 and the second frame 1131.

[0073] According to some embodiments of the present application, the second frame body 1131 is welded to the first frame body 112 .

[0074] The connection between the first frame 112 and the second frame 1131 is achieved by welding to improve the connection strength between the first frame 112 and the second frame 1131, thereby improving the structural strength of the box body 11 itself, which is beneficial to enhancing the impact resistance and shear resistance of the box body 10 in an impact environment.

[0075] According to some embodiments of this application, please refer to Figure 5 , and please refer to Figure 6 , Figure 6 for Figure 5 The enlarged view of the part of the box body 10 is shown. The inner wall of the second frame body 1131 protrudes toward the partition body 1132 to form a connecting portion 1131 a, and the connecting portion 1131 a is connected to the partition body 1132 .

[0076] The inner wall of the second frame 1131 protrudes toward the separator 1132 to form a connecting portion 1131a, that is, the inner wall of the second frame 1131 is provided with a connecting portion 1131a of an annular structure extending along the circumference of the separator 1132. Exemplarily, the connecting portion 1131a and the second frame 1131 are integrally formed, that is, the connecting portion 1131a and the second frame 1131 are an integrated structure.

[0077] Exemplarily, the separator 1132 is welded to the connecting portion 1131 a , and a weld is formed between the outer peripheral wall of the separator 1132 and the inner peripheral wall of the connecting portion 1131 a , so that the separator 1132 is welded to the connecting portion 1131 a .

[0078] By protruding a connecting portion 1131a on the inner wall of the second frame 1131 facing the separator 1132, the outer peripheral wall of the separator 1132 can be connected to the second frame 1131 through the connecting portion 1131a. The connector 113 with such a structure makes the seam between the separator 1132 and the connecting portion 1131a have a distance from the second frame 1131 in the extension direction of the separator 1132, so that the seam between the separator 1132 and the connecting portion 1131a can effectively avoid the corner between the connecting portion 1131a and the second frame 1131, thereby facilitating the connection of the separator 1132 to the second frame 1131, thereby reducing the difficulty of connecting the separator 1132 to the second frame 1131 and improving the connection strength between the separator 1132 and the second frame 1131.

[0079] According to some embodiments of this application, please continue to refer to Figure 5 and Figure 6 The separator 1132 has a thermal management region, and the thermal management region is used to adjust the temperature of the battery cell 20.

[0080] The separator 1132 has a heat management region, that is, the separator 1132 has a portion capable of regulating the temperature of the battery cell 20 located in the accommodation cavity 111 .

[0081] Optionally, a cooling channel 1132a for the cooling medium to flow is provided in the separator 1132, and the position corresponding to the cooling channel 1132a is the thermal management area of ​​the separator 1132, so that the cooling medium can take away the heat of the battery cell 20 when flowing through the cooling channel 1132a in the separator 1132, thereby achieving the function of regulating the temperature of the battery cell 20. Exemplarily, the cooling medium is cooling water, and the cooling channel 1132a is used for the cooling water to flow in, that is, the separator 1132 itself is a liquid cooling plate.

[0082] The separator 1132 is provided to adjust the thermal management area of ​​the battery cell 20 to reduce the temperature of the battery cell 20 in the box 10, thereby effectively alleviating the potential safety hazard of the battery 100 with such a box 10 when the temperature of the battery cell 20 rises. In addition, by providing the thermal management area on the separator 1132, the battery cells 20 in the two accommodating cavities 111 can share the thermal management area, which is conducive to reducing the manufacturing cost of the box 10, and is conducive to streamlining the structure of the box 10 and reducing the manufacturing difficulty.

[0083] According to some embodiments of this application, please continue to refer to Figure 5 and Figure 6, a heat conducting member 114 is disposed in each of the two accommodating chambers 111. The heat conducting member 114 is used to be disposed between the battery cell 20 and the separator 1132, and the heat conducting member 114 covers at least a portion of the thermal management area.

[0084] The heat conductive member 114 is disposed between the battery cell 20 and the separator 1132 to connect the battery cell 20 and the separator 1132 through the heat conductive member 114. Figure 5 In the embodiment, the heat conducting member 114 completely covers the heat management area of ​​the separator 1132 to improve the heat conduction effect. Of course, in other embodiments, the heat conducting member 114 may also partially cover the heat management area of ​​the separator 1132.

[0085] Exemplarily, the heat conductive member 114 is a heat conductive adhesive disposed on one side of the separator 1132 in the preset direction X, and the heat conductive adhesive is used to bond the battery cell 20 and the separator 1132 to achieve the transfer of heat from the battery cell 20 to the thermal management area of ​​the separator 1132. In other embodiments, the heat conductive member 114 may also be a heat conductive pad, etc. The specific structure of the heat conductive adhesive and the heat conductive pad can be referred to the relevant technology, which will not be repeated here.

[0086] By arranging a heat conductor 114 between the battery cell 20 and the separator 1132, and the heat conductor 114 covers at least a portion of the thermal management area, the heat conductor 114 can transfer the heat of the battery cell 20 to the thermal management area, thereby effectively improving the thermal conductivity between the battery cell 20 and the thermal management area, thereby facilitating the thermal management area to regulate the temperature of the battery cell 20, and is beneficial to improving the thermal management area's efficiency in regulating the temperature of the battery cell 20.

[0087] According to some embodiments of this application, please refer to Figure 5 and Figure 6 At least one of the two first frames 112 has a first weight-reducing cavity 1121 formed therein. And / or, a second weight-reducing cavity 1133 is formed therein.

[0088] Exemplarily, a first weight-reducing cavity 1121 is provided in the first frame 112 located on the upper side of the connecting member 113 of the two first frames 112, and a second weight-reducing cavity 1133 is provided in the second frame 1131 of the connecting member 113. The first weight-reducing cavity 1121 and the second weight-reducing cavity 1133 may be one, two, three, four, etc. Figure 5 In the embodiment, there are three first weight-reducing cavities 1121 and two second weight-reducing cavities 1133. In other embodiments, the first weight-reducing cavities 1121 may be provided in both first frames 112, and the second weight-reducing cavities 1133 may not be provided in the connecting member 113.

[0089] It should be noted that the first weight reduction chamber 1121 and the second weight reduction chamber 1133 can be set according to actual needs and the structural strength of the box body 10.

[0090] By opening a first weight-reducing cavity 1121 in the first frame 112 or a second weight-reducing cavity 1133 in the connector 113, it is helpful to reduce the weight of the box body 10 while ensuring the overall structural strength of the box body 10, thereby reducing the weight of the battery 100 having such a box body 10 for easy transportation and use.

[0091] According to some embodiments of this application, please refer to Figure 4 and Figure 5 The thickness of the cover plate 12 located at the bottom of the box body 11 is greater than the thickness of the cover plate 12 located at the top of the box body 11 .

[0092] During actual use, the battery cells 20 in the accommodating cavity 111 on the lower side of the box body 11 will exert a certain load force on the cover plate 12 located at the bottom of the box body 11. Therefore, increasing the thickness of the cover plate 12 located at the bottom of the box body 11 can improve the load-bearing capacity of the battery cells 20.

[0093] By setting the thickness of the cover plate 12 located at the bottom of the box body 11 to be greater than the other cover plate 12, the structural strength of the cover plate 12 located at the bottom of the box body 11 is improved, which is beneficial to improve the carrying capacity of the cover plate 12 located at the bottom of the box body 11 for the battery cells 20 in the accommodating cavity 111, thereby reducing the risk of deformation or damage of the cover plate 12 located at the bottom of the box body 11 during later use.

[0094] According to some embodiments of this application, please refer to Figure 5 The cover plate 12 located at the bottom of the box body 11 of the two cover plates 12 has a contact surface 121 for the battery cell 20 to contact on its side facing the accommodating cavity 111 .

[0095] Among them, the cover plate 12 located at the bottom of the box body 11 has a side facing the accommodating cavity 111 with abutment plane 121 for the battery cell 20 to abut, that is, the side of the cover plate 12 located at the bottom of the box body 11 facing the accommodating cavity 111 is a plane for the battery cell 20 to abut.

[0096] By setting the side of the cover plate 12 located at the bottom of the box body 11 facing the accommodating cavity 111 as a plane, the cover plate 12 located at the bottom of the box body 11 can provide better support and protection for the battery cell 20 in the accommodating cavity 111, which is beneficial to reduce the collision damage between the battery cell 20 and the cover plate 12 during later use.

[0097] According to some embodiments of the present application, the present application further provides a battery 100 , comprising a battery cell 20 and a box body 10 of any of the above solutions. The box body 10 is used to accommodate the battery cell 20 .

[0098] According to some embodiments of this application, please refer to Figure 4 The battery cell 20 has a first end and a second end opposite to each other in a preset direction X, the first end is used to output current, and the second end is used to face the bottom wall of the accommodating cavity 111.

[0099] The second end of the battery cell 20 is arranged to face the bottom wall of the accommodating cavity 111, that is, the second end of the battery cell 20 is arranged to face the separator 1132, that is, the battery cell 20 in the accommodating cavity 111 located at the lower side of the box body 11 is inverted, which is opposite to the arrangement direction of the battery cell 20 in the accommodating cavity 111 located at the upper side of the box body 11. When assembling the battery cell 20 into the box body 10, first turn the box body 11 over so that the accommodating cavity 111 located at the lower side of the box body 11 faces upward, and then after assembling the battery cell 20 into the accommodating cavity 111, cover the corresponding cover plate 12, and then turn the box body 11 over so that the battery cell 20 can be assembled in another accommodating cavity 111, and finally cover the corresponding cover plate 12. The assembly is simple and easy to operate.

[0100] By arranging the second end of the battery cell 20 facing toward the bottom wall of the accommodating cavity 111 of the box body 11, that is, the battery cells 20 in the two accommodating cavities 111 are arranged with their backs to the bottom wall of the accommodating cavity 111, the battery 100 adopting this structure is convenient for assembling the battery cells 20 in the two accommodating cavities 111 on the one hand, and on the other hand, the battery cells 20 in the two accommodating cavities 111 can share a thermal management area, which is beneficial to saving the manufacturing cost of the battery 100.

[0101] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 100 of any of the above schemes, and the battery 100 is used to provide electrical energy to the electrical device.

[0102] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0103] According to some embodiments of the present application, see Figure 3-Figure 5As shown, the present application provides a box body 10, which includes a box body 11 and two cover plates 12. The interior of the box body 11 has two accommodating cavities 111 arranged along a preset direction X. The box body 11 includes a connector 113 and two first frames 112. The connector 113 has a separator 1132 and a second frame 1131 extending along the circumference of the separator 1132. The two first frames 112 are respectively welded to the two ends of the second frame 1131 in the preset direction X. The inner peripheral wall of the second frame 1131 is convexly provided with a connecting portion 1131a extending along the circumference of the separator 1132. The inner peripheral wall of the connecting portion 1131a is welded to the outer peripheral wall of the separator 1132, so that the two first frames 112 and the connector 113 respectively form two accommodating cavities 111 for accommodating battery cells 20, and the two cover plates 12 respectively cover the openings of the two first frames 112 on one side away from the connector 113 in the preset direction X. A cooling channel 1132 a for adjusting the temperature of the battery cell 20 is provided in the separator 1132 , and a thermal conductive adhesive for heat conduction is provided between the separator 1132 and the battery cell 20 .

[0104] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A box, characterized in that: include: A box body, wherein two accommodating cavities arranged along a preset direction are formed inside the box body, the accommodating cavities are used to accommodate battery cells, and the two accommodating cavities respectively form openings on both sides of the box body in the preset direction; and Two cover plates, the two cover plates are used to cover the openings of the two accommodating chambers respectively; Wherein, the box body includes a connecting piece and two first frames, the two first frames are respectively connected to the two sides of the connecting piece in the preset direction, each first frame and the connecting piece together form a accommodating cavity, the first frame forms the opening on the side away from the connecting piece in the preset direction, and the connecting piece includes a second frame and a separator, the two ends of the second frame in the preset direction are respectively connected to the two first frames, the separator is fixed to the inner side of the second frame, and the separator is used to separate the two accommodating cavities.

2. The box according to claim 1, characterized in that: The second frame is welded to the first frame.

3. The box according to claim 1, characterized in that: A connecting portion is formed on an inner wall of the second frame body protruding toward the partition, and the connecting portion is connected to the partition.

4. The box according to any one of claims 1 to 3, characterized in that: The separator has a thermal management region for regulating the temperature of the battery cells.

5. The box according to claim 4, characterized in that: Heat conducting elements are arranged in both accommodating chambers; The heat conductive member is used to be disposed between the battery cell and the separator, and the heat conductive member covers at least a portion of the heat management area.

6. The box according to claim 1, characterized in that: A first weight reduction cavity is provided in at least one of the two first frames; and / or A second weight-reducing cavity is provided in the connecting piece.

7. The box according to claim 1, characterized in that: The thickness of the cover plate located at the bottom of the box body among the two cover plates is greater than the thickness of the cover plate located at the top of the box body.

8. The box according to claim 1, characterized in that: The cover plate of the two cover plates located at the bottom of the box body has a side facing the accommodating cavity with abutment surface for the battery cell to abut against.

9. A battery, characterized in that: include: Battery cells; as well as The box according to any one of claims 1 to 8, wherein the box is used to accommodate the battery cell.

10. The battery according to claim 9, characterized in that The battery cell has a first end and a second end opposite to each other in the preset direction; The first end is used for outputting current; The second end is arranged facing the bottom wall of the accommodating cavity.

11. An electrical device, characterized in that: A battery according to claim 9 or 10, for providing electrical energy.

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