Battery case and battery device

Abstract

The utility model relates to a battery shell and a battery device. The battery shell comprises a metal plate frame, a first cover plate and a second cover plate, the metal plate frame is provided with a containing cavity, the metal plate frame is provided with a first opening and a second opening, and the first opening and the second opening are both communicated with the containing cavity. The first cover plate covers the first opening, and the side edge of the first cover plate is connected with the upper edge of the metal plate frame in a sealed mode. The second cover plate covers the second opening, and the side edge of the second cover plate is connected with the lower edge of the metal plate frame in a sealed mode. The battery shell and the battery device have the advantages of low manufacturing cost and high efficiency.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery housing and a battery device. Background Art

[0002] The battery housing is an external protective structure of the battery device. It is used to wrap and fix the battery cells and has functions such as physical protection, isolation, heat dissipation, and electrical insulation.

[0003] The battery housing is generally formed by stamping metal sheets, and the stamping process involves stamping dies. Since there are a very large number of battery application types and sizes in current portable products, each size of battery housing requires a corresponding die, so the die opening cost is high. Further, the manufacturing cycle of the new die is long, which affects the overall development time of the battery device, and has the defects of high production cost and long cycle. Summary of the Utility Model

[0004] Based on this, in view of the problems of high production cost and long cycle existing in the battery housing, it is necessary to provide a battery housing and a battery device.

[0005] In a first aspect, a battery housing is provided, including:

[0006] A sheet metal frame, the sheet metal frame is provided with a receiving cavity, the sheet metal frame is provided with a first opening and a second opening, and both the first opening and the second opening are communicated with the receiving cavity;

[0007] A first cover plate, the first cover plate is covered on the first opening, and the side edge of the first cover plate is hermetically connected to the upper edge of the sheet metal frame;

[0008] A second cover plate, the second cover plate is covered on the second opening, and the side edge of the second cover plate is hermetically connected to the lower edge of the sheet metal frame; and

[0009] An explosion-proof member, the explosion-proof member is arranged on the first cover plate or the second cover plate, the explosion-proof member is an explosion-proof film, the first cover plate or the second cover plate is provided with a pressure relief hole, and the explosion-proof film is hermetically installed on the pressure relief hole through explosion-proof adhesive; or, the explosion-proof member is an explosion-proof valve, and the explosion-proof valve is set as a geometric figure; or, the explosion-proof member is an explosion-proof sheet, when the thickness of the second cover plate is 0.005 - 0.05 mm, the second cover plate is set as an explosion-proof sheet.

[0010] In one embodiment, the sheet metal frame includes a plurality of sheet metal bodies, and the plurality of sheet metal bodies are connected end to end through the side edges to form an annular frame structure, and the sheet metal bodies are integrally connected between them.

[0011] In one embodiment, the sheet metal frame is provided with a welding gap which penetrates through one of the sheet metal bodies, and the welding gap is hermetically filled with a laser weld seam.

[0012] In one embodiment, the welding gap is arranged obliquely or linearly; alternatively, the sheet metal body is provided with a groove on one side of the welding gap, and the sheet metal body is provided with a protrusion on the other side of the welding gap.

[0013] In one embodiment, the sheet metal frame includes a first connecting sheet body, a plurality of sheet metal bodies and a second connecting sheet body. The sides of the first connecting sheet body, the plurality of sheet metal bodies and the second connecting sheet body are integrally connected in sequence. The first connecting sheet body and the second connecting sheet body are arranged in an overlapping manner, and the gap between the first connecting sheet body and the second connecting sheet body is hermetically filled with a composite adhesive.

[0014] In one embodiment, the battery housing further includes an explosion-proof film. The first cover plate or the second cover plate is provided with a pressure relief hole, and the explosion-proof film hermetically covers the pressure relief hole through an explosion-proof adhesive; or,

[0015] The first cover plate or the second cover plate is provided with an explosion-proof valve, and the explosion-proof valve is arranged in a geometric shape.

[0016] In one embodiment, the sheet metal frame further includes a positive electrode sheet and a negative electrode sheet. The sheet metal frame is provided with a positive electrode lead-out hole, and the positive electrode sheet hermetically covers the positive electrode lead-out hole. The negative electrode sheet is connected to the outer side wall of the sheet metal frame; or,

[0017] The sheet metal frame further includes an electrode cover plate. The sheet metal frame is provided with an installation opening which is communicated with the accommodation cavity, and the electrode cover plate hermetically covers the installation opening. The electrode cover plate is provided with a positive electrode sheet and a negative electrode sheet.

[0018] In one embodiment, the sheet metal frame further includes a liquid injection cover plate. The sheet metal frame is provided with a liquid injection port, and the liquid injection cover plate hermetically covers the liquid injection port.

[0019] In one embodiment, the upper edge of the sheet metal frame is provided with an upper flanging, and the lower edge of the sheet metal frame is provided with a lower flanging. The side edge of the first cover plate is hermetically connected to the upper flanging, and the side edge of the second cover plate is hermetically connected to the lower flanging; or,

[0020] The side edge of the first cover plate is provided with a first side flanging, and the side edge of the second cover plate is provided with a second side flanging. The first side flanging is hermetically connected to the upper edge of the side wall of the sheet metal frame, and the second side flanging is hermetically connected to the lower edge of the side wall of the sheet metal frame.

[0021] In a second aspect, a battery device is provided, which includes a battery cell and the battery housing described in any of the above embodiments. The battery cell is disposed in the accommodation cavity of the battery housing. The positive electrode tab of the battery cell is connected to the positive electrode plate of the battery housing, and the negative electrode tab of the battery cell is connected to the negative electrode plate of the battery housing.

[0022] For the above battery housing and battery device, by splitting the battery housing into three components: a sheet metal frame, a first cover plate, and a second cover plate, a first opening and a second opening are respectively provided at the upper end and the lower end of the sheet metal frame to make the accommodation cavity penetrate up and down. After the second cover plate is hermetically covered on the second opening, the battery cell can be placed in the accommodation cavity, and then the first cover plate is hermetically covered on the first opening, so that the entire battery housing seals and protects the battery cell. Since the sheet metal frame of the present application is a frame structure, it can be made by processes such as bending and welding of cut metal sheets, and the first cover plate and the second cover plate can also be obtained by cutting metal sheets. Therefore, the battery housing does not need to be stamped, saving the cost of mold opening and the time of mold opening, and having the advantages of low manufacturing cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an exploded schematic view of the battery device described in the embodiment of the present application.

[0024] Figure 2 It is a schematic structural view of the battery housing described in the embodiment of the present application.

[0025] Figure 3 It is a schematic connection structure view of the battery housing described in an embodiment of the present application.

[0026] Figure 4 It is a schematic connection structure view of the battery housing described in another embodiment of the present application.

[0027] Figure 5 It is a schematic connection structure view of the battery housing described in another embodiment of the present application.

[0028] Figure 6 It is a processing schematic view of the sheet metal frame of the battery housing described in an embodiment of the present application.

[0029] Figure 7 It is a schematic structural view of the welding gap of the battery housing described in an embodiment of the present application.

[0030] Figure 8 It is a schematic structural view of the welding gap of the battery housing described in another embodiment of the present application.

[0031] Figure 9 It is a schematic structural view of the welding gap of the battery housing described in another embodiment of the present application.

[0032] Figure 10 Schematic diagram of the processing of the sheet metal frame of the battery housing according to another embodiment of the present application.

[0033] Figure 11 Schematic diagram of the structure of the explosion-proof film of the battery housing according to the embodiment of the present application.

[0034] Figure 12 Schematic diagram of the structure of the electrode cover plate of the battery housing according to the embodiment of the present application.

[0035] Figure 13 Schematic diagram of the flanging structure of the sheet metal frame of the battery housing according to an embodiment of the present application.

[0036] Figure 14 Schematic diagram of the flanging structure of the sheet metal frame of the battery housing according to another embodiment of the present application.

[0037] Figure 15 Schematic diagram of the flanging structure of the sheet metal frame of the battery housing according to another embodiment of the present application.

[0038] Reference numerals in the drawings:

[0039] 10. Battery housing; 20. Battery cell;

[0040] 100. Sheet metal frame; 100A. Accommodation cavity; 100B. First opening; 100C. Second opening; 110. Sheet metal body; 110A. Welding gap; 120. Laser weld seam; 130. First connecting sheet body; 140. Second connecting sheet body; 150. Composite glue; 160A. Positive electrode lead-out hole; 160B. Mounting port; 160. Electrode cover plate; 161. Positive electrode sheet; 162. Negative electrode sheet; 170. Liquid injection cover plate; 170A. Liquid injection port; 181. Upper flanging; 182. Lower flanging;

[0041] 200. First cover plate; 200A. Pressure relief hole; 211. Explosion-proof film; 212. Explosion-proof adhesive; 220. Explosion-proof valve; 230. First side flanging;

[0042] 300. Second cover plate; 310. Second side flanging. Detailed implementation manners

[0043] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0045] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if there is a term "plural", the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and explicitly defined.

[0046] In the present application, unless otherwise clearly specified and defined, if there are terms such as "mounted", "connected", "coupled", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the connection inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] In the present application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0048] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0049] Refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 FIG. shows a schematic structural view of a battery housing in an embodiment of the present application. The battery housing 10 provided in an embodiment of the present application includes a sheet metal frame 100, a first cover plate 200 and a second cover plate 300. The sheet metal frame 100 is provided with a receiving cavity 100A. The upper end of the sheet metal frame 100 is provided with a first opening 100B, and the lower end of the sheet metal frame 100 is provided with a second opening 100C. Both the first opening 100B and the second opening 100C are communicated with the receiving cavity 100A. The first cover plate 200 is covered on the first opening 100B, and the side edge of the first cover plate 200 is hermetically connected to the upper edge of the sheet metal frame 100. The second cover plate 300 is covered on the second opening Figure 1 100C, and the side edge of the second cover plate 300 is hermetically connected to the lower edge of the sheet metal frame 100. In an exemplary embodiment, the first cover plate 200 and the second cover plate 300 can be formed by laser cutting or metal cutting. The thicknesses of the sheet metal frame 100, the first cover plate 200 and the second cover plate 300 are 0.03 mm - 0.3 mm.

[0050] The battery housing described in the embodiment of the present application is assembled into the battery housing 10 by three components, namely the sheet metal frame 100, the first cover plate 200 and the second cover plate 300. The first opening 100B and the second opening 100C are respectively provided at the upper end and the lower end of the sheet metal frame 100, so that the receiving cavity 100A is vertically penetrated. After the second cover plate

[0051] 300 is hermetically covered on the second opening 100C, the battery cell 20 can be placed in the receiving cavity 100A, and then the first cover plate 200 is hermetically covered on the first opening 100B, so that the battery housing 10 hermetically protects the entire battery cell 20.

[0051] In the battery housing described in the embodiments of the present application, since the battery housing 10 is split into a sheet metal frame 100, a first cover plate 200, and a second cover plate 300, and the sheet metal frame 100 is a frame structure, the sheet metal frame 100 can be made by processes such as bending and welding of cut metal sheets, and the first cover plate 200 and the second cover plate 300 can also be quickly obtained directly by cutting metal sheets. Therefore, the battery housing 10 does not require stamping processing, thus saving the cost of mold opening and also saving the time of mold opening, and having the advantages of low manufacturing cost and high efficiency.

[0052] In an alternative embodiment, as Figure 3 shown, the first cover plate 200 and the second cover plate 300 can be directly covered and connected to the end face of the sheet metal frame 100, or as Figure 4 shown, the side end faces of the first cover plate 200 and the second cover plate 300 can be connected to the inner side wall of the sheet metal frame 100. In other embodiments, as Figure 5 shown, an installation groove can also be provided on the inner side of the edge of the sheet metal frame 100, and then the first cover plate 200 and the second cover plate 300 are embedded in the installation groove for installation.

[0053] In an alternative embodiment, the sheet metal coefficient K value of the sheet metal frame 100 is 0.3 - 0.5, and the sheet metal R angle is 1 - 3 times the material thickness. For example, when the material thickness T of the sheet metal frame 100 is 0.075 mm, the sheet metal R angle of the sheet metal frame 100 is 0.1 mm, and the sheet metal coefficient K value of the sheet metal frame 100 is 0.33.

[0054] In an alternative embodiment, the materials of the sheet metal frame 100, the first cover plate 200, and the second cover plate 300 are SUS316L O state, and this stainless steel has excellent corrosion resistance.

[0055] Combined with Figure 6 shown, Figure 6 shows a schematic structural diagram of the sheet metal frame 100 of the battery housing in an embodiment of the present application. In some embodiments, the sheet metal frame 100 includes a plurality of sheet metal bodies 110, and the plurality of sheet metal bodies 110 are connected end to end through the sides to form an annular plate frame structure, and the sheet metal bodies 110 are integrally connected. The sheet metal frame 100 of this embodiment is formed by integrally connecting a plurality of sheet metal bodies 110, and the integral connection has better sealing performance. That is to say, the sheet metal bodies 110 can be made of metal sheets by laser cutting or hardware cutting into stainless steel profiles of the same size and specification, with a thickness of 0.2 mm, and then formed by bending with a bending machine. Compared with the stamping process, it has the advantages of good flexibility, low cost, and high efficiency.

[0056] Furthermore, as Figure 2 and Figure 6As shown, the sheet metal frame 100 has a welding gap 110A. The welding gap 110A runs through one of the sheet metal bodies 110, and the welding gap 110A is hermetically filled with a laser weld 120. Since the sheet metal body 110 is formed by bending a cut metal sheet, there is a welding gap 110A between the two connecting ends after bending. In order to connect the connecting ends after bending into one body, the welding gap 110A is connected by a laser welding process. Therefore, the welding gap 110A is hermetically filled with a laser weld 120. Since laser welding has a fast welding speed, high quality, good sealing performance, it can also reduce processing costs and improve quality.

[0057] In an optional embodiment, as Figure 7 and Figure 8 shown, the welding gap 110A is set as an oblique line or a straight line. It should be noted that the oblique welding gap 110A means that the two connecting ends of the sheet metal body 110 are spliced at complementary inclined angles. The weld of this splicing method has better quality and strength than the weld of the straight welding gap 110A.

[0058] In other embodiments, as Figure 9 shown, the sheet metal body 110 is provided with a groove on one side of the welding gap 110A, and the sheet metal body 110 is provided with a convex block on the other side of the welding gap 110A. For example, the welding gap 110A is set as an arc-shaped gap. By setting the two sides of the welding gap 110A as a mating connection of a convex block and a groove, the convex arc and the arc position of the groove of the sheet metal body 110 correspond and abut when the two connecting ends are connected, so as to prevent the connecting ends of the sheet metal body 110 from being misaligned during connection and ensure the processing quality of the sheet metal frame 100.

[0059] In some other embodiments, as Figure 10 shown, the sheet metal frame 100 includes a first connecting sheet body 130, multiple sheet metal bodies 110 and a second connecting sheet body 140. The sides of the first connecting sheet body 130, the multiple sheet metal bodies 110 and the second connecting sheet body 140 are integrally connected in sequence. The first connecting sheet body 130 and the second connecting sheet body 140 are overlapped, and the gap between the first connecting sheet body 130 and the second connecting sheet body 140 is hermetically filled with a composite adhesive 150. Specifically, the composite adhesive 150 is a modified epoxy resin adhesive, a modified polypropylene adhesive, a polyurethane adhesive, a hot melt adhesive, a modified acrylic adhesive or an anaerobic adhesive, etc.

[0060] In this embodiment, the sheet metal frame 100 is made by cutting a metal sheet into stainless steel profiles of the same size and specification by laser cutting or metal cutting, and then bending and forming with a bending machine. The two ends are respectively the first connecting sheet 130 and the second connecting sheet 140. By overlapping the first connecting sheet 130 and the second connecting sheet 140, the two can be connected by using the composite glue 150, thereby forming a complete sheet metal frame. Connecting with the composite glue 150 can ensure that the stress is evenly distributed on the joint surface, reducing the risk of stress concentration, thereby improving the strength and durability of the connection structure.

[0061] In an alternative embodiment, as Figure 11 shown, the battery housing 10 further includes an explosion-proof component. The explosion-proof component is disposed on the first cover plate 200 or the second cover plate 300. The explosion-proof component is an explosion-proof film 211. The first cover plate 200 or the second cover plate 300 is provided with a pressure relief hole 200A. The explosion-proof film 211 is hermetically installed on the pressure relief hole 200A through an explosion-proof adhesive 212. Specifically, when the thickness of the explosion-proof film 211 is 0.005 - 0.05 mm, the explosion-proof film 211 relieves pressure by rupturing. That is to say, by covering the explosion-proof film 211 on the pressure relief hole 200A of the battery housing 10, its main function is to release the pressure through the rupture of the explosion-proof film 211 when the internal pressure of the battery housing 10 rises abnormally, thereby preventing the battery device from exploding and ensuring the safety of the user. Further, when the thickness of the explosion-proof film 211 is greater than 0.05 mm, the explosion-proof adhesive 212 is a low-melting-point modified PP glue or a hot-melt glue. That is to say, the explosion-proof film 211 is pasted through the thermoplastic explosion-proof adhesive 212. The explosion-proof adhesive 212 can reduce its viscosity when it senses high temperature, so that the explosion-proof film 211 is easy to fall off, thereby relieving pressure inside and preventing explosion, having the advantage of high safety.

[0062] In another embodiment, as Figure 2 shown, the first cover plate 200 or the second cover plate 300 is provided with an explosion-proof valve 220. The explosion-proof valve 220 is set as a geometric figure. Specifically, the explosion-proof valve 220 is a circular arc-shaped groove with a certain depth formed by laser etching. Since the explosion-proof valve 220 is a groove, the thickness at the explosion-proof valve 220 is smaller. When the pressure inside the battery housing 10 increases, the internal high-pressure gas first breaks through the explosion-proof valve 220 with a smaller thickness, and the circular arc-shaped groove is easier to release pressure after being blasted, thereby preventing explosion, having the advantage of high safety.

[0063] In other embodiments, the explosion-proof component can also be an explosion-proof film. Specifically, when the thickness of the second cover plate 300 is between 0.005 - 0.05 mm, the second cover plate 300 is set as the explosion-proof film. By setting the thickness of the second cover plate 300 to be much smaller than other components of the battery housing 10, the second cover plate 300 is set as the explosion-proof film. Since the explosion-proof film is the thinnest part of the battery housing 10, when the internal pressure just starts to accumulate, it can break through the explosion-proof film, so that the pressure is released, avoiding the explosion of the battery device.

[0064] In an alternative embodiment, as Figure 1 and Figure 2 shown, the sheet metal frame 100 further includes a positive electrode sheet 161 and a negative electrode sheet 162. The sheet metal frame 100 is provided with a positive electrode lead-out hole 160A, and the positive electrode sheet 161 is hermetically covered on the positive electrode lead-out hole 160A, and the negative electrode sheet 162 is connected to the outer side wall of the sheet metal frame 100. Specifically, the positive electrode sheet 161 and the negative electrode sheet 162 can be connected to the sheet metal frame 100 by welding, composite glue or riveting. By providing the positive electrode sheet 161 and the negative electrode sheet 162 and connecting them to the electrode tabs in the battery cell 20, the charge in the battery device can be stored and released.

[0065] In other embodiments, as Figure 12 shown, the sheet metal frame 100 further includes an electrode cover plate 160. The sheet metal frame 100 is provided with an installation opening 160B, and the installation opening 160B is communicated with the accommodation cavity 100A. The electrode cover plate 160 is hermetically covered on the installation opening 160B, and the electrode cover plate 160 is provided with a positive electrode sheet 161 and a negative electrode sheet 162. Specifically, the electrode cover plate 160 can be connected to the sheet metal frame 100 by welding, composite glue or riveting. By directly connecting the electrode cover plate 160 to the sheet metal frame 100, the processing technology can be optimized and the processing efficiency can be improved.

[0066] In an alternative embodiment, as Figure 1 and Figure 2 shown, the sheet metal frame 100 further includes a liquid injection cover plate 170. The sheet metal frame 100 or the electrode cover plate 160 is provided with a liquid injection port 170A, and the liquid injection cover plate 170 is hermetically covered on the liquid injection port 170A. Specifically, the liquid injection cover plate 170 can be hermetically covered on the liquid injection port 170A by welding technology. By providing the liquid injection port 170A, when the battery cell 20 is installed in the accommodation cavity 100A, battery liquid is injected into the accommodation cavity 100A through the liquid injection port 170A, and then the liquid injection port 170A is sealed with the liquid injection cover plate 170 to complete the battery production process.

[0067] In an alternative embodiment, as Figure 13 and Figure 14As shown, the upper edge of the sheet metal frame 100 is provided with an upward flanging 181, and the lower edge of the sheet metal frame 100 is provided with a downward flanging 182. The side of the first cover plate 200 is hermetically connected to the upward flanging 181, and the side of the second cover plate 300 is hermetically connected to the downward flanging 182. By providing the upward flanging 181 at the upper edge of the sub-sheet metal frame 100 and the downward flanging 182 at the lower edge, a reinforcing structure is formed at the edge part of the sheet metal frame 100. At the same time, the connection area between the first cover plate 200 and the second cover plate 300 and the sheet metal frame 100 is increased, thereby increasing the connection strength between the first cover plate 200 and the second cover plate 300 and the sheet metal frame 100.

[0068] In another alternative embodiment, as Figure 15 shown, the side of the first cover plate 200 is provided with a first side flanging 230, and the side of the second cover plate, 300 is provided with a second side flanging 310. The first side flanging 230 is hermetically connected to the upper edge of the side wall of the sheet metal frame 100, and the second side flanging 310 is hermetically connected to the lower edge of the side wall of the sheet metal frame 100. Similarly, by providing the first side flanging 230 on the first cover plate 200 and the second side flanging 310 on the second cover plate 300, the first side flanging 230 and the second side flanging 310 are connected to the sheet metal frame 100, increasing the connection strength between the first cover plate 200 and the second cover plate 300 and the sheet metal frame 100.

[0069] On the other hand, the present application also provides a battery device, as Figure 1 and Figure 2 shown, including a battery cell 20 and the battery housing 10 described in any of the above embodiments. The battery cell 20 is disposed in the accommodation cavity 100A of the battery housing 10. The positive electrode tab of the battery cell 20 is connected to the positive electrode plate 161 of the battery housing 10, and the negative electrode tab of the battery cell 20 is connected to the negative electrode plate 162 of the battery housing 10.

[0070] In the battery device described in the embodiments of the present application, the battery cell 20 is hermetically disposed in the accommodation cavity 100A of the battery housing 10. Since the battery housing 10 is split into a sheet metal frame 100, a first cover plate 200, and a second cover plate 300, and the sheet metal frame 100 is a frame structure, the sheet metal frame 100 can be made by processes such as bending and welding of cut metal sheets. The first cover plate 200 and the second cover plate 300 can also be directly obtained quickly by cutting metal sheets. Therefore, the battery housing 10 does not need to be stamped, thus saving the cost of mold opening and also saving the time of mold opening, having the advantages of low manufacturing cost and high efficiency.

[0071] The battery housing and the battery device described in the embodiments of the present application have the following beneficial effects:

[0072] Since the battery housing 10 is split into a sheet metal frame 100, a first cover plate 200, and a second cover plate 300, and the sheet metal frame 100 is a frame structure, the sheet metal frame 100 can be made from cut metal sheets through processes such as bending and welding. The first cover plate 200 and the second cover plate 300 can also be quickly obtained directly by cutting metal sheets. Therefore, the battery housing 10 does not need to be stamped, saving the cost of mold opening and the time for mold opening, and having the advantages of low manufacturing cost and high efficiency.

[0073] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0074] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery housing, characterized in that: include: A sheet metal frame (100), the sheet metal frame (100) being provided with a receiving cavity (100A), the sheet metal frame (100) being provided with a first opening (100B) and a second opening (100C), the first opening (100B) and the second opening (100C) both being in communication with the receiving cavity (100A); a first cover plate (200), the first cover plate (200) being arranged to cover the first opening (100B), the side edge of the first cover plate (200) being sealedly connected to the upper edge of the sheet metal frame (100); a second cover plate (300), the second cover plate (300) being arranged to cover the second opening (100C), the side edge of the second cover plate (300) being sealedly connected to the lower edge of the sheet metal frame (100); as well as An explosion-proof component, wherein the explosion-proof component is arranged on the first cover plate (200) or the second cover plate (300), the explosion-proof component is an explosion-proof membrane (211), the first cover plate (200) or the second cover plate (300) is provided with a pressure relief hole (200A), and the explosion-proof membrane (211) is sealed and installed on the pressure relief hole (200A) through an explosion-proof adhesive (212); or, the explosion-proof component is an explosion-proof valve (220), and the explosion-proof valve (220) is set in a geometric shape; or, the explosion-proof component is an explosion-proof disk, and when the thickness of the second cover plate (300) is 0.005-0.05 mm, the second cover plate (300) is set as an explosion-proof disk.

2. The battery case according to claim 1, wherein: The sheet metal frame (100) comprises a plurality of sheet metal sheets (110), wherein the plurality of sheet metal sheets (110) are connected end to end through side edges to form a ring-shaped plate frame structure, and the sheet metal sheets (110) are integrally connected.

3. The battery case according to claim 2, wherein: The sheet metal frame (100) is provided with a welding gap (110A), the welding gap (110A) is provided through one of the sheet metal pieces (110), and the welding gap (110A) is sealed and filled with a laser weld (120).

4. The battery case according to claim 3, wherein: The welding gap (110A) is arranged as an oblique line or a straight line; or, the sheet metal body (110) is provided with a groove on one side of the welding gap (110A), and the sheet metal body (110) is provided with a protrusion on the other side of the welding gap (110A).

5. The battery case according to claim 1, wherein: The sheet metal frame (100) includes a first connecting sheet (130), a plurality of sheet metal sheets (110) and a second connecting sheet (140), the sides of the first connecting sheet (130), the plurality of sheet metal sheets (110) and the second connecting sheet (140) are sequentially integrated and connected, the first connecting sheet (130) and the second connecting sheet (140) are arranged in an overlapping manner, and the gap between the first connecting sheet (130) and the second connecting sheet (140) is sealed and filled with composite glue (150).

6. The battery case according to claim 1, wherein: The thickness of the sheet metal frame (100), the first cover plate (200) and the second cover plate (300) is 0.03 mm-0.3 mm.

7. The battery case according to claim 1, wherein: The sheet metal frame (100) further comprises a positive electrode sheet (161) and a negative electrode sheet (162), the sheet metal frame (100) is provided with a positive electrode lead-out hole (160A), a sealing cover of the positive electrode sheet (161) is provided on the positive electrode lead-out hole (160A), and the negative electrode sheet (162) is connected to an outer side wall of the sheet metal frame (100); or, The sheet metal frame (100) further comprises an electrode cover plate (160), the sheet metal frame (100) being provided with a mounting opening (160B), the mounting opening (160B) being in communication with the accommodating cavity (100A), the electrode cover plate (160) having a sealing cover disposed on the mounting opening (160B), and the electrode cover plate (160) being provided with a positive electrode sheet (161) and a negative electrode sheet (162).

8. The battery case according to claim 1, wherein: The sheet metal frame (100) further comprises a liquid injection cover plate (170), the sheet metal frame (100) is provided with a liquid injection port (170A), and a sealing cover of the liquid injection cover plate (170) is provided at the liquid injection port (170A).

9. The battery case according to claim 1, wherein: The upper edge of the sheet metal frame (100) is provided with an upper flange (181), the lower edge of the sheet metal frame (100) is provided with a lower flange (182), the side of the first cover plate (200) is sealed to the upper flange (181), and the side of the second cover plate (300) is sealed to the lower flange (182); or, The side edge of the first cover plate (200) is provided with a first side flange (230), and the side edge of the second cover plate (300) is provided with a second side flange (310). The first side flange (230) is sealed to the upper edge of the side wall of the sheet metal frame (100), and the second side flange (310) is sealed to the lower edge of the side wall of the sheet metal frame (100).

10. A battery device, characterized in that: The invention comprises a battery cell (20) and a battery casing (10) according to any one of claims 1 to 9, wherein the battery cell (20) is arranged in a receiving cavity (100A) of the battery casing (10), the positive electrode tab of the battery cell (20) is connected to the positive electrode sheet (161) of the battery casing (10), and the negative electrode tab of the battery cell (20) is connected to the negative electrode sheet (162) of the battery casing (10).

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