Battery shell, battery monomer and electric equipment

Abstract

The utility model provides a battery shell, battery monomer and electric equipment, relates to battery technical field, the battery shell includes shell frame and soft envelope, said soft envelope with shell frame seal connection to form the shell structure, said shell structure has internal cavity and with the opening of said cavity intercommunication, said shell frame is sealed with the soft envelope, said soft envelope is sealed with said cavity. The opening is formed in the shell frame, and at least one face of the cavity is provided with the soft wrapping film. According to the utility model, an enough deformation range is provided for expansion generated in the rapid charging process of the battery monomers, so that the service life of the battery shell is correspondingly prolonged on the basis of ensuring the structural integrity of the battery shell.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery shell, a battery cell and an electrical device. Background Art

[0002] Lithium batteries, such as lithium metal batteries, are batteries with lithium metal as the negative electrode, oxide as the positive electrode, and non-aqueous electrolyte as the electrolyte. They have the advantages of high energy density, long life, and low self-discharge rate. They are widely used in mobile electronic devices, new energy vehicles and other fields.

[0003] Lithium batteries mainly include a metal shell and positive electrode materials, negative electrode materials and electrolytes arranged in the metal shell. During the charging process of the lithium metal battery, the external current passes through the inside of the battery, which will move some lithium ions from the negative electrode to the positive electrode, and at the same time move the lithium ions from the positive electrode back to the negative electrode to achieve electrical energy storage and release. During fast charging, "lithium deposition" is very likely to occur, causing the metal shell to expand during the lithium deposition process. This expansion will cause damage to the welds of the metal shell, such as the bends of the metal shell, and the connections between the metal shell and the positive and negative electrode materials, thereby affecting the structural integrity of the battery shell. Utility Model Content

[0004] The problem solved by the utility model is how to ensure the structural integrity of the shell of a battery cell during the rapid charging process.

[0005] To solve the above problems, in the first aspect, the utility model provides a battery shell, comprising a shell frame and a soft-coat film, wherein the soft-coat film is sealed and connected to the shell frame to form a shell structure, wherein the shell structure has an internal cavity and an opening connected to the cavity, wherein the opening is arranged on the shell frame, and at least one surface of the cavity has the soft-coat film.

[0006] Optionally, the shell frame is a rectangular parallelepiped frame structure, an installation opening is opened on at least one side wall of the shell frame, the soft membrane is arranged at the installation opening, and the soft membrane is sealed and connected to the edge of the installation opening.

[0007] Optionally, the mounting port includes a first mounting port, the soft envelope membrane includes two first diaphragms, the side walls of the two larger surfaces along the first direction of the shell frame respectively open first mounting ports, and the two first diaphragms are respectively sealed and connected to the corresponding first mounting ports.

[0008] Optionally, the mounting port also includes a second mounting port, and the second mounting port is opened on a side wall of the shell frame opposite to the opening. The soft package membrane also includes a second diaphragm, and the second diaphragm is arranged at the second mounting port, and the second diaphragm is sealed and connected to the edge of the second mounting port.

[0009] Optionally, the mounting opening further includes a second mounting opening and a third mounting opening, the second mounting opening being provided on a side wall of the housing frame opposite to the opening, and the third mounting opening being provided on a side wall of the housing frame along a second direction, the second direction being perpendicular to the first direction;

[0010] The soft envelope film further includes a second diaphragm and a third diaphragm, the second diaphragm is sealed and connected to the edge of the second installation opening, and the third diaphragm is sealed and connected to the edge of the third installation opening.

[0011] Optionally, the soft envelope is a rectangular shell with one side open, and the shell frame is a ring structure and is arranged at the open side of the rectangular shell to enclose the opening of the shell structure.

[0012] Optionally, the shell frame is provided with a bending portion along the edge of the installation opening.

[0013] Optionally, the edge of the soft coating is sealed to the side wall of the bent portion, or the soft coating is sealed to the side wall of the bent portion and the shell frame near the bent portion.

[0014] Optionally, the bending portion includes a first bending portion, and the first bending portion is bent inward relative to the side wall of the housing frame.

[0015] Optionally, the bending portion includes a first bending portion and a second bending portion, the first bending portion is bent inward relative to the side wall of the shell frame, and the first bending portion is bent outward relative to the soft envelope to form the second bending portion.

[0016] Optionally, the shell frame is made of metal material; and / or the soft envelope is made of aluminum-plastic film material, or steel-plastic film material.

[0017] Optionally, the soft envelope includes an anti-corrosion layer, a structural layer and a connecting layer stacked from the outside to the inside, and the connecting layer is sealed and connected to the shell frame.

[0018] Compared with the prior art, the battery shell of the present invention has the following beneficial effects: the battery shell mainly includes a shell frame and a soft film, the soft film is sealed and connected to the shell frame to form a shell structure with an opening, and the shell structure shell serves as the battery shell.

[0019] Other major components of the battery cell, such as the electrolyte, positive electrode core, and negative electrode core, can be installed inside the battery housing to assemble a battery cell. When a battery cell, such as a lithium battery, expands due to "lithium deposition" during rapid charging, the flexible film's tensile properties can be utilized to produce elastic deformation, thereby releasing internal pressure during the rapid charging operation. This prevents the battery housing from expansion, deformation, and damage, thereby ensuring the structural integrity and sealing of the battery housing.

[0020] In a second aspect, the present invention further provides a battery cell comprising the battery housing as described above.

[0021] Since the battery cell includes the battery housing, the battery cell at least has all the technical effects of the battery housing, which will not be described in detail here.

[0022] In a third aspect, the present invention further provides an electrical device, comprising a housing and the battery cells as described above, wherein a plurality of the battery cells are installed in the housing.

[0023] Since the electrical equipment includes a battery cell, the electrical equipment has at least all the technical effects of the battery cell, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the structural schematic diagrams of the first embodiment of the utility model in which the battery housing is arranged horizontally.

[0025] Figure 2 This is the second structural diagram of the first embodiment of the utility model in which the battery housing is arranged horizontally.

[0026] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0027] Figure 4 for Figure 2 Schematic diagram of the local structure.

[0028] Figure 5 This is a structural diagram of a second embodiment of the utility model in which the battery housing is arranged horizontally.

[0029] Figure 6 for Figure 5 Schematic diagram of the local structure.

[0030] Figure 7 This is a structural diagram of a third embodiment of the utility model in which the battery housing is arranged horizontally.

[0031] Figure 8 for Figure 7 Schematic diagram of the local structure.

[0032] Figure 9 This is one of the structural diagrams of the fourth embodiment of the utility model in which the battery housing is arranged horizontally.

[0033] Figure 10 This is the second structural diagram of the fourth embodiment of the utility model in which the battery housing is arranged horizontally.

[0034] Figure 11 for Figure 10 Schematic diagram of the local structure.

[0035] Figure 12 This is a structural diagram of a fifth embodiment of the utility model in which the battery housing is arranged horizontally.

[0036] Figure 13 This is one of the structural diagrams of the first embodiment of the utility model in which the battery housing is arranged vertically.

[0037] Figure 14 This is the second structural diagram of the first embodiment of the utility model in which the battery housing is arranged vertically.

[0038] Figure 15 for Figure 14 Schematic diagram of the enlarged structure at point B in the middle.

[0039] Figure 16 This is a structural diagram of a second embodiment of the utility model in which the battery housing is arranged vertically.

[0040] Figure 17 for Figure 16 Schematic diagram of the enlarged structure at point C in the middle.

[0041] Figure 18 This is a structural diagram of a third embodiment of the utility model in which the battery housing is arranged vertically.

[0042] Figure 19 for Figure 18 Schematic diagram of the enlarged structure at point D in the middle.

[0043] Description of reference numerals:

[0044] 1-shell frame; 110-first mounting port; 111-opening; 12-first bending portion; 13-second bending portion; 2-soft envelope; 21-first diaphragm; 22-second diaphragm; 23-third diaphragm. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0046] The Z-axis in the accompanying drawings represents the vertical direction, that is, the up-down position, with the positive direction of the Z-axis representing the top and the reverse direction of the Z-axis representing the bottom. The X-axis in the accompanying drawings represents the horizontal direction and is designated as the left-right position, with the positive direction of the X-axis representing the right side and the reverse direction of the X-axis representing the left side. The Y-axis in the accompanying drawings represents the front-to-back position, with the positive direction of the Y-axis representing the front side and the reverse direction of the Y-axis representing the rear side. It should also be noted that the aforementioned Z-axis, Y-axis, and X-axis are merely for the purpose of facilitating the description of the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0047] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in this utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0048] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0049] In response to the problems existing in the above-mentioned related technologies, this embodiment provides a battery housing.

[0050] like Figure 1As shown, an embodiment of the present invention provides a battery shell, comprising a shell frame 1 and a soft-coat film 2, wherein the soft-coat film 2 is sealed and connected to the shell frame 11 to form a shell structure, wherein the shell structure has an internal cavity and an opening 111 connected to the cavity, wherein the opening 111 is arranged on the shell frame 1, and at least one surface of the cavity has the soft-coat film 2.

[0051] Specifically, an opening 111 may be opened at the top of the housing structure so that components other than the battery housing in the battery cell can be installed in the battery housing through the opening 111 .

[0052] In this embodiment, the battery housing mainly includes a housing frame 1 and a soft-pack film 2 . The soft-pack film 2 is sealed and connected to the housing frame 1 to form a housing structure with an opening 111 . The housing structure serves as the battery housing.

[0053] Other main components of the battery cell, such as the electrolyte, the positive electrode core and the negative electrode core, can be installed inside the battery shell to assemble a battery cell. When a battery cell, such as a lithium battery, expands due to the "lithium deposition" phenomenon during rapid charging, the elastic deformation produced by the stretching properties of the soft-coat film 2 is utilized to release the internal pressure of the lithium battery during rapid charging operation, thereby preventing the battery shell from expanding, deforming and being damaged, and ensuring the structural integrity and sealing of the battery shell. "Lithium deposition" refers to the phenomenon that during the battery charging process, the rate at which lithium ions migrate from the positive electrode to the negative electrode is greater than the actual maximum diffusion rate allowed, causing lithium ions to aggregate and adhere to the electrode surface in certain local areas.

[0054] Optionally, the shell frame 1 is a rectangular parallelepiped frame structure, an installation opening is opened on at least one side wall of the shell frame 1, the soft film 2 is arranged at the installation opening, and the soft film 2 is sealed and connected to the edge of the installation opening.

[0055] Specifically, a mounting opening can be opened on at least one side wall of the shell frame 1, and the soft film 2 is set at the mounting opening so that the soft film 2 can be deformed at the mounting opening to ensure the structural integrity of the battery cell during charging.

[0056] Since an opening 111 is provided at the top of the housing structure, so that the housing frame 1 of the rectangular parallelepiped frame structure has five side walls, a mounting opening can be provided on at least one side wall of the rectangular parallelepiped frame structure.

[0057] Optionally, combined Figures 2 to 7 、 Figure 9 、 Figure 13 、 Figure 14 、 Figures 16 to 18As shown, the mounting port includes a first mounting port 110, the soft-encapsulated membrane 2 includes two first diaphragms 21, and the side walls of the two larger surfaces along the first direction of the shell frame 1 respectively open the first mounting ports 110, and the two first diaphragms 21 are respectively sealed and connected to the corresponding first mounting ports 110.

[0058] Specifically, the first direction is Figure 1 The housing frame 1 is parallel to the middle X-axis. Since the housing frame 1 is a rectangular parallelepiped frame structure and the opening 111 is preset at the top of the housing frame 1, the housing frame 1 has five side walls. Among them, the two side walls of the housing frame 1 along the first direction have the largest surface area. Therefore, the two side walls of the housing frame 1 along the first direction can be defined as the larger surface.

[0059] Among them, the mounting port includes a first mounting port 110, and the two first diaphragms 21 can be arranged at intervals along the first direction. The first mounting port 110 is opened on the larger surface of the shell frame 1, and the outer edge of each first diaphragm 21 is sealed with the edge of the first mounting port 110 of the shell frame 1 to assemble and form a battery shell with a certain degree of sealing.

[0060] In this optional embodiment, since the two first diaphragms 21 are respectively arranged at the first mounting openings 110 opened on the two larger surfaces of the shell frame 1, the two first diaphragms 21 with larger areas provide a sufficient deformation range for the expansion generated by the battery cell during the rapid charging process, so as to extend the service life of the battery shell accordingly while ensuring the structural integrity of the battery shell.

[0061] Optionally, combined Figures 9 to 11 As shown, the mounting port also includes a second mounting port, and the second mounting port is opened on a side wall of the shell frame 1 opposite to the opening 111. The soft-package membrane 2 also includes a second diaphragm 22, and the second diaphragm 22 is arranged at the second mounting port, and the second diaphragm 22 is sealed and connected to the edge of the second mounting port.

[0062] Specifically, a second mounting port can be opened on a side wall of the shell frame 1 opposite to the opening 111, such as the bottom wall, and the second diaphragm 22 can be installed at the second mounting port; the soft-package membrane 2 includes a second diaphragm 22 and two first diaphragms 21, and the two ends of the second diaphragm 22 along the first direction are respectively connected to the bottom ends of the two first diaphragms 21, so that the two first diaphragms 21 and the one second diaphragm 22 basically form a U-shaped soft-package membrane 2.

[0063] In this optional embodiment, since the two ends of the second diaphragm 22 along the first direction are respectively connected to the bottoms of the corresponding two first diaphragms 21, after the soft-pack membrane 2 and the shell frame 1 are assembled into a battery shell, the soft-pack membrane 2 has three deformable areas, namely the areas where the two first diaphragms 21 and one second diaphragm 22 are located, thereby further increasing the deformation margin of the soft-pack membrane 2 and ensuring the structural integrity of the battery shell.

[0064] Optionally, combined Figure 12 As shown, the mounting opening further includes a second mounting opening and a third mounting opening. The second mounting opening is provided on a side wall of the housing frame 1 opposite to the opening 111, and the third mounting opening is provided on a side wall of the housing frame 1 along a second direction, wherein the second direction is perpendicular to the first direction.

[0065] The soft-encapsulated membrane 2 further includes a second membrane 22 and a third membrane 23 . The second membrane 22 is sealed and connected to the edge of the second installation opening, and the third membrane 23 is sealed and connected to the edge of the third installation opening.

[0066] Specifically, the soft-encapsulated membrane 2 includes two first diaphragms 21, a second diaphragm 22 and two third diaphragms 23, wherein the two first diaphragms 21 are spaced apart along the first direction, the two third diaphragms 23 are spaced apart along the second direction, and the second diaphragm 22 is located at the second mounting port of the shell frame 1, and the two ends of the second diaphragm 22 along the first direction are connected to the bottom of the two first diaphragms 21, and the two ends of the second diaphragm 22 along the second direction are connected to the bottom of the two third diaphragms 23.

[0067] In this optional embodiment, the soft-pack membrane 2 has a total of five deformable areas, namely the areas where the two first diaphragms 21, the second diaphragm 22 and the two third diaphragms 23 are located. In other words, the soft-pack membrane 2 can not only deform on the two first diaphragms 21 along the first direction and the two third diaphragms 23 along the second direction, but can also deform in the vertical direction, such as the bottom, thereby further increasing the deformation margin of the soft-pack membrane 2 and ensuring the structural integrity of the battery shell.

[0068] Optionally, the shape of the soft-coat membrane 2 of this embodiment is different from the structure of the soft-coat membrane 2 of the above-mentioned embodiment. For example, the soft-coat membrane 2 is a rectangular shell with one side open, and the shell frame 1 is a ring structure and is arranged at the open end of the rectangular shell to enclose the opening 111 of the shell structure.

[0069] Specifically, the soft envelope 2 can be a rectangular shell with an open top, the rectangular shell having five side walls, and the shell frame 1 can be a rectangular ring structure. The bottom end of the shell frame 1 is sealedly connected to the top end of the soft envelope 2 which is a rectangular shell, and the shell frame 1 with an annular structure and the open end of the rectangular shell form the opening 111 of the shell structure.

[0070] In this embodiment, the soft-pack membrane 2 has a total of five deformable areas, namely, two side walls arranged at intervals along the first direction, such as the left and right side walls, two side walls arranged at intervals along the second direction, such as the front and rear side walls, and side walls along the vertical direction, such as the bottom wall, thereby further increasing the deformation margin of the soft-pack membrane 2 and ensuring the structural integrity of the battery shell.

[0071] Optionally, the housing frame 1 is provided with a bent portion along the edge of the mounting opening.

[0072] Specifically, the housing frame 1 can be bent to form a bent portion at the edge of the installation opening.

[0073] In this embodiment, since the housing frame 1 is provided with a bent portion at the edge of the installation opening, the mechanical strength of the housing frame 1 can be effectively enhanced, and its service life can be extended accordingly.

[0074] Optionally, the edge of the soft coating 2 is sealed to the side wall of the bent portion, or the soft coating 2 is sealed to the side wall of the bent portion and the shell frame 1 near the bent portion.

[0075] Specifically, the soft-coat membrane 2 is sealedly connected to the side wall of the bending portion, such as the outer wall or the inner wall; or, the soft-coat membrane 2 is sealedly connected to the side wall of the bending portion and the shell frame 1 near the bending portion, thereby increasing the connection length or area between the soft-coat membrane 2 and the shell frame 1, thereby improving the connection stability between the soft-coat membrane 2 and the shell frame 1.

[0076] Optionally, the bending portion includes a first bending portion 12 , and the first bending portion 12 is bent inward relative to the side wall of the housing frame 1 .

[0077] Specifically, combined Figure 3 、 Figure 4 、 Figure 6 、 Figure 11 、 Figure 17 and Figure 19 As shown, the first bent portion 12 is bent inward relative to the housing frame 1. The first bent portion 12 not only increases the mechanical strength of the housing frame 1 but also facilitates the sealed connection with the soft envelope 2. Inward refers to the interior of the housing structure.

[0078] Optionally, the bending portion includes a first bending portion 12 and a second bending portion 13 , wherein the first bending portion 12 is bent inward relative to the side wall of the shell frame 1 , and the first bending portion 12 is bent outward relative to the soft envelope 2 to form the second bending portion 13 .

[0079] Specifically, combined Figure 8 、 Figure 15 As shown, the bent portion formed at the mounting opening of the housing frame 1 includes a first bent portion 12 and a second bent portion 13. The first bent portion 12 is bent inward relative to the side wall of the housing frame 1, and then the first bent portion 12 is bent outward to form the second bent portion 13. Bending outward refers to bending toward the outside of the housing structure.

[0080] In this embodiment, the housing frame 1 is sequentially bent at the ends adjacent to the mounting opening, such as the top (and bottom), to form a first bent portion 12 and a second bent portion 13, thereby increasing the bending length of the housing frame 1 adjacent to the mounting opening, further enhancing the mechanical strength of the housing frame 1. The inner sidewalls of the second bent portion 13 and the first bent portion 12 are respectively sealed to the soft film 2, which not only prevents dust from entering the connection between the two but also increases the connection length between the soft film 2 and the housing frame 1 at the bent portion, thereby correspondingly improving the stability of the connection between the two.

[0081] Optionally, the shell structure extends in a horizontal direction, or the shell structure extends in a vertical direction.

[0082] Specifically, combined Figure 1 、 Figure 2 、 Figure 5 、 Figure 7 、 Figure 9 、 Figure 10 and Figure 12 As shown, the shell structure extends in the horizontal direction. In other words, the length of the shell structure extends in the horizontal direction, wherein the horizontal direction refers to Figure 1 The plane on which the XY axes lie in the coordinate system.

[0083] Combine Figure 13 、 Figure 14 、 Figure 16 、 Figure 18 As shown, the shell structure extends in the vertical direction. In other words, the length of the shell structure extends in the vertical direction, wherein the vertical direction refers to Figure 13 The direction of the Z axis in the coordinate system.

[0084] Optionally, the shell frame 1 is made of metal material; and / or the soft package film 2 is made of aluminum-plastic film material, or steel-plastic film material.

[0085] Specifically, the housing frame can be made of metal materials to ensure that the entire battery housing has a certain mechanical rigidity and strength, so as to ensure a certain safety protection effect on the battery cells, such as other components of the lithium battery. The housing frame 1 can be made of metal materials such as aluminum and steel.

[0086] The soft package film 2 can be made of aluminum-plastic film material, steel-plastic film material, or other foil materials with flexible deformation properties, which are not specifically limited here.

[0087] Optionally, the soft envelope 2 includes an anti-corrosion layer, a structural layer, and a connecting layer stacked from the outside to the inside, and the connecting layer is sealed and connected to the shell frame 1 .

[0088] Specifically, the soft envelope film 2 includes but is not limited to the two first membranes 21 mentioned above, and may further include a second membrane 22 , and may further include the second membrane 22 and two third membranes 23 .

[0089] Each diaphragm in the soft-coated film 2 can adopt the following structural method, for example, the anti-corrosion layer is at the outermost side, the connecting layer is at the innermost side, and the structural layer is between the anti-corrosion layer and the connecting layer, wherein the anti-corrosion layer can be made of polypropylene material (can be referred to as PP material), or polyethylene terephthalate material (can be referred to as PET material), or other materials with anti-corrosion effect, thereby extending the service life of the soft-coated film. The structural layer can be made of metal materials such as aluminum, steel, iron, etc. to ensure that the first diaphragm has a certain mechanical rigidity to avoid the soft-coated film being too soft and unable to support the current shape. The connecting layer can be made of polypropylene material, which is used to be sealed and connected to the shell frame at the installation port by hot melting under the action of high temperature.

[0090] In at least one of the above embodiments, the sealing connection between the connection layer of the soft envelope and the shell frame 1 includes but is not limited to hot melt connection, and can also be bonding, etc., which is not specifically limited here.

[0091] An embodiment of the present invention further provides a battery cell, comprising the battery housing as described above.

[0092] Specifically, the battery cell may also include an electrolyte, a separator, a positive electrode core and a negative electrode core. The positive electrode core and the negative electrode core are spaced apart and arranged inside the battery shell which is a shell structure. The separator is arranged in the shell structure to isolate the positive electrode core and the negative electrode core. The electrolyte is contained in the shell structure.

[0093] The battery cell also includes an end cover. If the battery housing has an opening 111, the end cover is sealed to the top opening of the housing frame; if the battery housing has two openings arranged opposite to each other, the two end covers are respectively covered at the corresponding openings.

[0094] The battery cell may also include a positive electrode ear and a negative electrode ear, which are respectively arranged on the end cover, and the positive electrode ear and the negative electrode ear are respectively connected to the positive electrode core and the negative electrode core inside the battery shell; the positive electrode ear and the negative electrode ear can serve as the positive terminal and negative terminal of the battery cell respectively.

[0095] The battery cells in the above embodiments may be lithium-ion batteries, lithium metal batteries, or other types of battery cells. As long as the battery cells can avoid damage to the shell due to expansion caused by the "lithium deposition" phenomenon during rapid charging through the outward deformation of the above-mentioned soft-encapsulated membrane, they are all suitable for this technical solution.

[0096] The beneficial effects of the battery cell of this embodiment relative to the prior art are the same as those of the battery housing described above, and will not be described in detail here.

[0097] An embodiment of the present invention further provides an electrical device, comprising a housing and the battery cells described above, wherein a plurality of the battery cells are installed in the housing.

[0098] Specifically, since a single battery shell or a single battery cell is basically a rectangular structure, when multiple battery cells are installed in the casing to assemble into a battery pack, compared with the cylindrical batteries in the prior art, the casing of the present application does not waste internal space, thereby achieving a higher battery pack energy density.

[0099] The electrical equipment is applied to electric vehicles, energy storage cabinets, and other technical fields requiring battery cells, which are not specifically limited here.

[0100] The beneficial effects of the electrical equipment of this embodiment relative to the prior art are the same as those of the above-mentioned battery cell, and will not be described in detail here.

[0101] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A battery housing, characterized in that: The invention comprises a shell frame (1) and a soft coating (2), wherein the soft coating (2) is sealedly connected to the shell frame (1) to form a shell structure, wherein the shell structure has an internal cavity and an opening (111) communicating with the cavity, wherein the opening (111) is arranged on the shell frame (1), and at least one surface of the cavity has the soft coating (2).

2. The battery case according to claim 1, wherein: The shell frame (1) is a rectangular parallelepiped frame structure, and a mounting opening is provided on at least one side wall of the shell frame (1). The soft coating (2) is arranged at the mounting opening, and the soft coating (2) is sealed and connected to the edge of the mounting opening.

3. The battery case according to claim 2, characterized in that The mounting port includes a first mounting port (110), the soft envelope membrane (2) includes two first membranes (21), the side walls of the two larger surfaces along the first direction of the shell frame (1) are respectively provided with the first mounting ports (110), and the two first membranes (21) are respectively sealed and connected to the corresponding first mounting ports (110).

4. The battery case according to claim 3, characterized in that The mounting port also includes a second mounting port, and the second mounting port is opened on a side wall of the shell frame (1) opposite to the opening (111). The soft-encapsulated membrane (2) also includes a second diaphragm (22), and the second diaphragm (22) is arranged at the second mounting port, and the second diaphragm (22) is sealed and connected to the edge of the second mounting port.

5. The battery case according to claim 3, characterized in that The mounting opening further comprises a second mounting opening and a third mounting opening, the second mounting opening being provided on a side wall of the housing frame (1) opposite to the opening (111), and the third mounting opening being provided on a side wall of the housing frame (1) along a second direction, the second direction being perpendicular to the first direction; The soft envelope membrane (2) further comprises a second membrane (22) and a third membrane (23), wherein the second membrane (22) is sealedly connected to the edge of the second installation opening, and the third membrane (23) is sealedly connected to the edge of the third installation opening.

6. The battery case according to claim 1, wherein: The soft envelope (2) is a rectangular parallelepiped shell with one side open, and the shell frame (1) is an annular structure and is arranged at the open end of the rectangular parallelepiped shell to form an opening (111) of the shell structure.

7. The battery case according to claim 2, wherein: The housing frame (1) is provided with a bent portion along the edge of the installation opening.

8. The battery case according to claim 7, characterized in that The edge of the soft coating (2) is sealed to the side wall of the bent portion, or the soft coating (2) is sealed to the side wall of the bent portion and the shell frame (1) adjacent to the bent portion.

9. The battery case according to claim 7, characterized in that: The bending portion comprises a first bending portion (12), and the first bending portion (12) is bent inward relative to the side wall of the shell frame (1).

10. The battery case according to claim 7, wherein: The bending portion comprises a first bending portion (12) and a second bending portion (13), wherein the first bending portion (12) is bent inward relative to the side wall of the shell frame (1), and the first bending portion (12) is bent outward relative to the soft envelope (2) to form the second bending portion (13).

11. The battery case according to claim 1, wherein: The shell frame (1) is made of metal material; and / or the soft envelope film (2) is made of aluminum-plastic film material or steel-plastic film material.

12. The battery case according to any one of claims 1 to 11, characterized in that: The soft envelope (2) comprises an anti-corrosion layer, a structural layer and a connecting layer stacked and distributed from the outside to the inside, and the connecting layer is sealed and connected to the shell frame (1).

13. A battery cell, characterized in that: The battery case comprises the battery case according to any one of claims 1 to 12.

14. An electrical device, characterized in that: The invention comprises a housing and the battery cell according to claim 13 , wherein a plurality of the battery cells are installed in the housing.

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