Batteries and electrical devices

Abstract

The present invention provides a battery and an electrical device. The battery includes a supporting member, a battery cell, a cover plate, and a seal. The battery cell is fixed to the supporting member. The supporting member includes a first accommodating cavity having a first opening. The first accommodating cavity is located on a side of the supporting member facing away from the battery cell. The cover plate is connected to the supporting member and is used to cover the first opening. The seal is at least partially located between the cover plate and the supporting member to seal the first opening. The battery provided by the present invention can improve the safety of the battery.

Description

Technical Field

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

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0003] How to improve the safety of battery use is an important research direction in battery technology. Summary of the Invention

[0004] The present application provides a battery and an electrical device, which can improve the safety of battery use.

[0005] In a first aspect, embodiments of the present application provide a battery comprising a carrier, a battery cell, a cover plate, and a seal. The battery cell is secured to the carrier, which includes a first accommodating cavity having a first opening, the first accommodating cavity being disposed on a side of the carrier facing away from the battery cell. The cover plate is connected to the carrier and is configured to cover the first opening, and the seal is at least partially disposed between the cover plate and the carrier to seal the first opening.

[0006] In the above technical solution, a seal is provided between the cover plate and the supporting component to seal the first opening, thereby significantly reducing the amount of water entering the first accommodating chamber when the battery is wading through water, extending the service life of the components inside the first accommodating chamber, making the internal components close to or in an insulating state, and improving the safety of battery use.

[0007] In some embodiments, the seal has a width of 0.2 mm to 50 mm.

[0008] In the above technical solution, limiting the seal width to greater than or equal to 0.2 mm can meet the sealing performance requirements of the seal and significantly reduce the amount of water entering the first accommodating chamber. Limiting the seal width to less than or equal to 50 mm can avoid the seal occupying too much space and being too heavy, reducing the waste of internal battery space, increasing space utilization, and improving the battery's energy density.

[0009] In some embodiments, the sealing member is made of a foam material, and the width of the sealing member is 4 mm to 30 mm.

[0010] In the above technical solution, the seal is made of a low-density foam material, and its width is limited to greater than or equal to 4 mm to meet the sealing performance requirements of the foam material. Limiting the width of the foam material to less than or equal to 30 mm can avoid the seal occupying too much space and being too heavy, reducing the waste of internal battery space, increasing space utilization, and improving the battery's energy density.

[0011] In some embodiments, the material of the sealing member includes rubber, and the width of the sealing member is 1 mm-20 mm.

[0012] In the above technical solution, the seal is made of high-density rubber and its width is limited to 1 mm or greater to meet the required sealing performance of the rubber. Limiting the rubber width to 20 mm or less prevents the seal from taking up too much space and being too heavy, thus reducing waste in the battery's internal space, increasing space utilization, and improving the battery's energy density.

[0013] In some embodiments, the width of the seal is L, the weight of the battery is M, and L and M satisfy: 0.0002 mm / kg≤L / M≤5 mm / kg.

[0014] In the above technical solution, limiting the L / M value to greater than or equal to 0.0002 mm / kg can meet the sealing performance requirements of the seal, ensuring that the components in the first accommodating chamber are close to or insulated when the battery is in wading conditions, thereby improving the safety of the battery. Limiting the seal width to less than or equal to 5 mm / kg can prevent the seal from occupying too much space and being too heavy, reducing the waste of internal battery space, increasing space utilization, and improving the battery's energy density.

[0015] In some embodiments, when the sealing member is made of a foam material, L and M satisfy the following relationship: 0.005 mm / kg≤L / M≤0.5 mm / kg.

[0016] In the above technical solution, the seal is made of a low-density foam material, and the L / M ratio is limited to greater than or equal to 0.005 mm / kg to meet the sealing performance requirements of the foam material. Limiting the L / M ratio to less than or equal to 0.5 mm / kg can prevent the seal from occupying too much space and increasing its mass, reducing waste in the battery's internal space, increasing space utilization, and improving the battery's energy density.

[0017] In some embodiments, when the sealing member is made of rubber material, L and M satisfy the following relationship: 0.001 mm / kg≤L / M≤0.05 mm / kg.

[0018] In the above technical solution, the seal is made of a high-density rubber material, and the L / M ratio is limited to greater than or equal to 0.001 mm / kg to meet the sealing performance requirements of rubber. Limiting the L / M ratio to less than or equal to 0.05 mm / kg can prevent the seal from occupying too much space and increasing its mass, reducing waste in the battery's internal space, increasing space utilization, and improving the battery's energy density.

[0019] In some embodiments, the battery further includes a box body having a second opening, the supporting component covers the second opening to form a second accommodating cavity with the box body; the battery cell is disposed in the second accommodating cavity.

[0020] In the above technical solution, the battery cell is accommodated in the box body, and the supporting component covers the second opening to form a closed second accommodation cavity, so as to improve the sealing performance of the battery cell and further improve the safety of the battery.

[0021] In some embodiments, the supporting component includes a supporting plate and an annular plate. The supporting plate is used to cover the second opening to form a second accommodating cavity with the box body; the annular plate is arranged on the side of the supporting plate away from the box body and forms a first accommodating cavity with the supporting plate.

[0022] In the above technical solution, the carrier plate and the annular plate enclose a first accommodating cavity, and the cover plate covers the first opening of the first accommodating cavity, thereby forming a closed space for accommodating components and reducing contamination of the components.

[0023] In some embodiments, the annular plate includes a side wall and a top wall, the top wall is disposed opposite to the supporting plate and encloses the first opening, and the side wall is disposed around the top wall and connected to the supporting plate.

[0024] In the above technical solution, by arranging the top wall on the side wall, the contact area between the bearing component and the cover plate can be increased, which facilitates the fixation of the cover plate and the bearing component and improves the sealing effect between the cover plate and the bearing component.

[0025] In some embodiments, the seal is fixedly connected to the top wall.

[0026] In the above technical solution, the sealing member is fixedly connected to the top wall, and the top wall encloses and forms the first opening, so the sealing member connected to the top wall can play a good sealing role.

[0027] In some embodiments, a projection of the top wall onto the sealing member along the thickness direction of the top wall covers the sealing member.

[0028] In the above technical solution, the projection of the top wall in its thickness direction covers the seal, and the seal is completely sandwiched between the cover plate and the top wall. All parts of the seal play a sealing role, thereby maximizing the sealing effect of the seal.

[0029] In some embodiments, the seal is an annular structure.

[0030] In the above technical solution, the sealing member is provided as an annular structure, which can enclose the entire first opening and provide better sealing performance.

[0031] In some embodiments, a control box is further included, which is accommodated in the first accommodation cavity and electrically connected to the battery cell.

[0032] In the above technical solution, the first accommodating cavity is used to accommodate the control box, and the sealing member seals the first accommodating cavity, thereby reducing water erosion, extending the service life of the control box, and improving the safety of battery use.

[0033] In a second aspect, the present application provides an electrical device comprising a battery according to any embodiment of the first aspect, wherein the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0035] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0036] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0037] Figure 3 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0038] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0039] Figure 5 for Figure 2 a top view of the battery shown;

[0040] Figure 6 for Figure 5 Partial cross-sectional view at BB;

[0041] Figure 7 for Figure 2 Schematic diagram of the structure of the battery seal shown.

[0042] In the drawings, the drawings are not drawn to scale.

[0043] The reference numerals for the specific embodiments are as follows:

[0044] 1. Vehicle;

[0045] 2. Battery; 21. Carrying member; 211. First accommodating chamber; 212. First opening; 213. Carrying plate; 214. Annular plate; 215. Side wall; 216. Top wall; 22. Control box; 23. Cover plate; 24. Seal; 25. Box; 251. Second opening; 252. Second accommodating chamber; 26. Battery cell;

[0046] 3. Controller;

[0047] 4. Motor. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. 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" and any variations thereof in the specification and claims of this application and the above-mentioned drawings 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-secondary relationship.

[0050] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0052] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0053] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0054] The term "plurality" used in this application refers to two or more (including two).

[0055] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the embodiments of this application are not limited thereto. Battery cells may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0056] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0057] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell primarily relies on the movement of metal ions between the positive and negative electrode sheets to operate. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector includes a positive coating area and a positive electrode tab connected to the positive coating area. The positive coating area is coated with the positive active material layer, while the positive electrode tab is not coated with the positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material. The positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, which is coated on the surface of the current collector. The negative current collector includes a negative coating region and a negative tab connected to the negative coating region. The negative coating region is coated with the negative active material layer, while the negative tab is not coated with the negative active material layer. The negative current collector can be made of copper, and the negative active material layer includes a negative active material, which can be carbon or silicon. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene).

[0058] The battery cell also includes a housing, which has a housing formed inside for accommodating the electrode assembly. The housing can protect the electrode assembly from the outside to prevent external foreign matter from affecting the charging or discharging of the electrode assembly.

[0059] Batteries typically consist of a load-bearing component and a cover plate. The cover plate is used to connect to the vehicle body, while the load-bearing component holds the battery cells. The load-bearing component has a storage cavity for the components, and the cover plate and load-bearing component are connected and fixed to seal the cavity. Because vehicles may wade through water, there is a risk of water ingress into the cavity, which can affect the normal operation of the components inside and even cause damage.

[0060] The inventors discovered that although the cover plate and the supporting components have been fixed, there is still a risk of water entering the accommodating cavity when the vehicle is in a wading condition, which will affect the normal use of the components in the accommodating cavity and even cause abnormal insulation of the components therein, thereby causing a safety accident.

[0061] In view of this, the present application provides a technical solution, which improves the sealing between the bearing component and the cover plate by adding a seal between the cover plate and the bearing component, meets the use requirements of the components in the accommodating cavity under water conditions, and improves the safety of battery use.

[0062] The battery cells described in the embodiments of the present application are suitable for use in batteries and electrical devices using the battery cells.

[0063] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0064] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0065] Figure 1 A schematic structural diagram of a vehicle provided for some embodiments of the present application.

[0066] like Figure 1 As shown, a battery 2 is provided inside the vehicle 1, and the battery 2 can be provided at the bottom, head, or tail of the vehicle 1. The battery 2 can be used to power the vehicle 1, for example, the battery 2 can be used as an operating power source for the vehicle 1.

[0067] The vehicle 1 may further include a controller 3 and a motor 4 . The controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, to meet the power requirements of the vehicle 1 during startup, navigation, and driving.

[0068] In some embodiments of the present application, the battery 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0069] In battery 2, there can be one or more battery cells. If there are multiple battery cells, they can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple battery cells is secured to a support component. Alternatively, multiple battery cells can be first connected in series, in parallel, or in a hybrid configuration to form a battery module, and then the multiple battery modules can be connected in series, in parallel, or in a hybrid configuration to form an entire structure, which is then secured to a support component.

[0070] Figure 2 This is a schematic diagram of the structure of the battery provided in some embodiments of the present application. Figure 3 Schematic diagram of the exploded structure of the battery provided in some embodiments of the present application, Figure 4 for Figure 2 The enlarged view of point A in the middle. Figure 5 for Figure 2 A top view of the battery shown, Figure 6 for Figure 5 Partial cross-sectional view at BB.

[0071] like Figure 2-6 As shown, the battery 2 of the embodiment of the present application includes a carrier 21, a battery cell 26, a cover plate 23, and a seal 24. The battery cell 26 is fixed to the carrier 21. The carrier 21 includes a first accommodating cavity 211 having a first opening 212. The first accommodating cavity 211 is located on a side of the carrier 21 facing away from the battery cell 26. The battery cell 26 is fixed to the carrier 21. The cover plate 23 is connected to the carrier 21 and is used to cover the first opening 212. The seal 24 is at least partially disposed between the cover plate 23 and the carrier 21 to seal the first opening 212.

[0072] The embodiment of the present application does not limit the connection method of the sealing member 24 to the bearing member 21 and the cover plate 23. For example, the sealing member 24 is fixed to the bearing member 21 and the cover plate 23 by welding, threading, riveting or bonding.

[0073] Optionally, the sealing member 24 is entirely located between the cover plate 23 and the bearing component 21 .

[0074] The embodiment of the present application does not limit the connection method between the battery cell 26 and the supporting component 21. The two can be connected by bonding, threading or other types of connection methods.

[0075] The embodiment of the present application does not limit the types of components in the first accommodating cavity 211 . Optionally, the components in the first accommodating cavity 211 are electrically connected to the battery cell 26 .

[0076] The embodiment of the present application does not limit the shape of the sealing member 24, and can be annular or in other shapes. When the sealing member 24 is annular, it can be formed by splicing multiple sections or can be an integrally formed structure.

[0077] The present embodiment does not limit the specific material of the sealing member 24 , but it needs to have a certain ability to generate deformation and be able to recover at least part of the deformation when the external force is removed. For example, it can be rubber.

[0078] Due to the presence of first accommodating chamber 211, water can easily accumulate in first accommodating chamber 211 when the battery 2 is exposed to water, potentially causing insulation problems within the internal components. Therefore, a seal 24 is provided between cover plate 23 and support member 21 to seal first opening 212. This significantly reduces the amount of water that enters first accommodating chamber 211 when the battery 2 is exposed to water, extending the service life of the internal components within first accommodating chamber 211 and ensuring that the internal components are in a near-insulated state, thereby improving battery safety.

[0079] In some embodiments, the seal 24 has a width of 0.2 mm to 50 mm.

[0080] In the embodiment of the present application, the sealing member 24 is disposed around the first opening 212 . Since the sizes of different parts of the sealing member 24 may be different, the width of the sealing member 24 in the embodiment of the present application refers to the width of any part of the sealing member 24 .

[0081] For example, when the width of the sealing member 24 needs to be measured, the sealing member 24 may be removed from between the cover plate 23 and the bearing member 21 , and then a vernier caliper may be used to measure the width of the sealing member 24 .

[0082] The width of seal 24 affects its sealing performance. A wider seal 24 improves sealing performance, but reduces the energy density of battery 2. A smaller seal 24 reduces sealing performance, but increases the energy density of battery 2. Given this, this application defines a width range for seal 24 to adjust its sealing performance and balance it with the energy density of battery 2.

[0083] Limiting the width of the seal 24 to greater than or equal to 0.2 mm can meet the sealing performance requirements of the seal 24 and significantly reduce the amount of water entering the first accommodating chamber 211. Limiting the width of the seal 24 to less than or equal to 50 mm can prevent the seal 24 from occupying too much space and being too heavy, reducing the waste of space inside the battery 2, increasing space utilization, and improving the energy density of the battery 2.

[0084] Alternatively, the seal 24 may have a width of 0.2 mm, 0.5 mm, 1 mm, 3 mm, 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, or 50 mm.

[0085] Limiting the width of the seal 24 to between 0.2 mm and 50 mm can balance the sealing performance of the seal 24 and the energy density of the battery 2 .

[0086] When the sealing member 24 is made of different materials, its sealing performance will be different, and therefore the required width range will also be different.

[0087] In some embodiments, the sealing member 24 is made of foam material, and the width of the sealing member 24 is 4 mm-30 mm.

[0088] In the embodiment of the present application, the width of the sealing member 24 includes two end values: 4 mm and 30 mm.

[0089] The embodiments of the present application do not limit the specific type of foaming material. For example, the foaming material is foaming rubber, foaming silicone, etc.

[0090] The seal 24 is made of a relatively low-density foam material, and its width is limited to 4 mm or greater to meet the sealing performance requirements of the foam material. Limiting the width of the foam material to 30 mm or less prevents the seal 24 from taking up too much space and being too heavy, thus reducing waste within the battery 2, increasing space utilization, and improving the energy density of the battery 2.

[0091] In some embodiments, the material of the sealing member 24 includes rubber, and the width of the sealing member 24 is 1 mm-20 mm.

[0092] In the embodiment of the present application, the width of the sealing member 24 includes two end values: 1 mm and 20 mm.

[0093] Sealing member 24 is made of high-density rubber and its width is limited to 1 mm or greater to meet the required sealing performance of the rubber. Limiting the rubber width to 20 mm or less prevents seal 24 from taking up too much space and being too heavy, thus reducing space waste within battery 2, increasing space utilization, and improving the energy density of battery 2.

[0094] Figure 7 for Figure 2 Schematic diagram of the structure of the battery seal shown.

[0095] like Figure 7 As shown, in some embodiments, the width of the seal 24 is L, the weight of the battery 2 is M, and L and M satisfy: 0.0002 mm / kg≤L / M≤5 mm / kg.

[0096] The value of L can be measured in a variety of ways. For example, the value of L can be measured using a vernier caliper.

[0097] As can be seen from the above, the wider the seal 24, the better its sealing performance, but the lower the energy density of the battery 2; the smaller the width of the seal 24, the worse its sealing performance, but the higher the energy density of the battery 2. In view of this, the present application also defines the ratio of the width of the seal 24 and the weight of the battery 2 to balance the sealing performance of the seal 24 and the energy density of the battery 2.

[0098] The larger the L / M value, the better the sealing performance, but the lower the energy density of the battery 2. If the L / M value is too large, it will result in overdesign, resulting in a low energy density of the battery 2. However, the smaller the width of the seal 24, the worse its sealing performance.

[0099] Therefore, limiting the L / M ratio to greater than or equal to 0.0002 mm / kg can meet the sealing performance requirements of the seal 24, ensuring that the components of the first accommodating chamber 211 of the battery 2 are close to or insulated when the battery 2 is in wading conditions, thereby improving the safety of the battery 2. Limiting the width of the seal 24 to less than or equal to 5 mm / kg can prevent the seal 24 from occupying too much space and being too heavy, reducing the waste of space within the battery 2, increasing space utilization, and improving the energy density of the battery 2.

[0100] Alternatively, the value of L / M may be 0.0002 mm / kg, 0.001 mm / kg, 0.005 mm / kg, 0.01 mm / kg, 0.05 mm / kg, 0.1 mm / kg, 0.5 mm / kg, 0.8 mm / kg, 1 mm / kg, 2 mm / kg, 3 mm / kg, 4 mm / kg or 5 mm / kg.

[0101] As can be seen from the above, when the sealing member 24 is made of different materials, its sealing performance will be different, and therefore the required width range will also be different.

[0102] In some embodiments, when the sealing member 24 is made of foam material, L and M satisfy the following relationship: 0.005 mm / kg≤L / M≤0.5 mm / kg.

[0103] The embodiments of the present application do not limit the specific type of foaming material. For example, the foaming material is foaming rubber, foaming silicone, etc.

[0104] The seal 24 is made of a low-density foam material, and the L / M ratio is limited to greater than or equal to 0.005 mm / kg to meet the sealing performance requirements of the foam material. Limiting the L / M ratio to less than or equal to 0.5 mm / kg can prevent the seal 24 from occupying too much space and increasing its mass, reducing waste within the battery 2, increasing space utilization, and improving the energy density of the battery 2.

[0105] In some embodiments, when the seal 24 is made of rubber material, L and M satisfy the following relationship: 0.001 mm / kg≤L / M≤0.05 mm / kg.

[0106] The seal 24 is made of a high-density rubber material, and the L / M ratio is limited to greater than or equal to 0.001 mm / kg to meet the sealing performance requirements of the rubber. Limiting the L / M ratio to less than or equal to 0.05 mm / kg prevents the seal 24 from occupying too much space and increasing its mass, reducing waste within the battery 2, increasing space utilization, and improving the energy density of the battery 2.

[0107] In some embodiments, the battery 2 further includes a box body 25 having a second opening 251 . The supporting member 21 covers the second opening 251 to form a second accommodating cavity 252 with the box body 25 . The battery cell 26 is disposed in the second accommodating cavity 252 .

[0108] The embodiment of the present application does not limit the shape of the box body 25 . Optionally, the box body 25 matches the shape and size of the internal battery cells 26 .

[0109] The battery cell 26 is accommodated in the box body 25 , and the supporting component 21 covers the second opening 251 to form a closed second accommodation cavity 252 , so as to improve the sealing performance of the battery cell 26 and further improve the safety of the battery 2 .

[0110] In some embodiments, the supporting component 21 includes a supporting plate 213 and an annular plate 214. The supporting plate 213 is used to cover the second opening 251 to form a second accommodating cavity 252 with the box body 25; the annular plate 214 is arranged on the side of the supporting plate 213 away from the box body 25, and is surrounded by the supporting plate 213 to form a first accommodating cavity 211.

[0111] The embodiment of the present application does not limit the shape of the annular plate 214 . Optionally, the annular plate 214 matches the shape of the components in the first accommodating cavity 211 .

[0112] The embodiment of the present application does not limit the shape of the supporting plate 213 , and optionally, it matches the shape and size of the box body 25 .

[0113] The embodiment of the present application does not limit the connection method between the carrier plate 213 and the annular plate 214. For example, the two can be connected by integral molding, bonding, riveting or threaded connection.

[0114] The carrying plate 213 and the annular plate 214 enclose a first accommodating cavity 211 , and the cover plate 23 covers the first opening 212 of the first accommodating cavity 211 , thereby forming a closed space for accommodating components and reducing contamination of the components.

[0115] In some embodiments, the annular plate 214 includes a side wall 215 and a top wall 216 . The top wall 216 is disposed opposite to the supporting plate 213 and encloses the first opening 212 . The side wall 215 surrounds the top wall 216 and is connected to the supporting plate 213 .

[0116] The embodiment of the present application does not limit the connection method of the side wall 215 and the top wall 216. For example, the side wall 215 and the top wall 216 are formed in one piece.

[0117] The sidewall 215 is disposed around the top wall 216 , that is, the sidewall 215 is connected to the outer periphery of the top wall 216 , and the top wall 216 extends inward from the sidewall 215 to enclose the first opening 212 .

[0118] Optionally, the top wall 216 is connected to the end of the side wall 215 facing away from the supporting plate 213. Further optionally, the top wall 216 is parallel to the supporting plate 213.

[0119] By providing the top wall 216 on the side wall 215 , the contact area between the bearing component 21 and the cover plate 23 can be increased, thereby facilitating the fixation of the cover plate 23 and the bearing component 21 and improving the sealing effect between the cover plate 23 and the bearing component 21 .

[0120] In some embodiments, the seal 24 is fixedly connected to the top wall 216 .

[0121] Optionally, the sealing member 24 is threadedly connected to the top wall 216 and the cover plate 23 .

[0122] The sealing member 24 is fixedly connected to the top wall 216 , and the top wall 216 encloses and forms the first opening 212 . Therefore, the sealing member 24 connected to the top wall 216 can play a good sealing role.

[0123] In some embodiments, the projection of the top wall 216 onto the seal 24 along the thickness direction of the top wall 216 covers the seal 24 .

[0124] Optionally, the sealing member 24 is plate-shaped, and the top wall 216 is parallel to the sealing member 24 .

[0125] The projection of the top wall 216 in its thickness direction covers the seal 24 . The seal 24 is completely sandwiched between the cover plate 23 and the top wall 216 , and all parts thereof play a sealing role, thereby maximizing the sealing effect of the seal 24 .

[0126] In some embodiments, the seal 24 is an annular structure.

[0127] The sealing member 24 may be a ring-shaped structure formed by connecting or splicing multiple sections, or may be a ring-shaped structure formed by integral molding.

[0128] The embodiment of the present application does not limit the specific shape of the annular structure. For example, the shape of the sealing member 24 matches the shape of the top wall 216 .

[0129] The sealing member 24 is configured as an annular structure, which can surround the entire first opening 212 and provide better sealing performance.

[0130] In some embodiments, the battery 2 further includes a control box 22 , which is received in the first receiving cavity 211 and electrically connected to the battery cell 26 .

[0131] Optionally, the control box 22 is a high-voltage box for controlling the opening and closing of the relay.

[0132] The first accommodating cavity 211 of the embodiment of the present application is used to accommodate the control box 22. The sealing member 24 seals the first accommodating cavity 211, thereby reducing water erosion, extending the service life of the control box 22, and improving the safety of the battery 2.

[0133] The embodiment of the present application further provides an electrical device, comprising the above-mentioned battery 2, wherein the battery 2 is used to provide electrical energy.

[0134] See also Figure 2-Figure 6 The embodiment of the present application provides a battery 2, which includes a carrying component 21, a battery cell 26, a cover plate 23, a case 25, a control box 22, and a seal 24. The carrying component 21 includes a first accommodating cavity 211 having a first opening 212, and the battery cell 26 is fixed to the carrying component 21. The cover plate 23 is connected to the carrying component 21 and is used to cover the first opening 212. The seal 24 is at least partially disposed between the cover plate 23 and the carrying component 21 to seal the first opening 212. The case 25 has a second opening 251, and the carrying component 21 covers the second opening 251 to enclose a second accommodating cavity 252 with the case 25; the battery cell 26 is located in the second accommodating cavity 252. The control box 22 is accommodated in the first accommodating cavity 211 and is electrically connected to the battery cell 26.

[0135] The seal 24 is an annular structure. The width of the seal 24 is greater than 0.2 mm and less than 50 mm. The width of the seal 24 is L, and the weight of the battery 2 is M. L and M satisfy the following relationship: 0.0002 mm / kg ≤ L / M ≤ 5 mm / kg.

[0136] The carrier component 21 includes a carrier plate 213 and an annular plate 214. The carrier plate 213 is used to cover the second opening 251, thereby forming a second accommodating chamber 252 with the housing 25. The annular plate 214 is disposed on the side of the carrier plate 213 facing away from the housing 25 and, together with the carrier plate 213, forms the first accommodating chamber 211. The annular plate 214 includes sidewalls 215 and a top wall 216. The top wall 216 is located on the side of the sidewalls 215 facing away from the carrier plate 213 and forms the first opening 212. The sidewalls 215 surround the top wall 216 and are connected to the carrier plate 213. The seal 24 is fixedly connected to the top wall 216.

[0137] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery comprising: Battery cells; a carrying component, the battery cell is fixed to the carrying component, the carrying component includes a first accommodating cavity having a first opening, and the first accommodating cavity is arranged on a side of the carrying component away from the battery cell; a cover plate connected to the bearing member and used to cover the first opening; as well as A seal is at least partially disposed between the cover plate and the bearing component to seal the first opening; the width of the seal is 0.2 mm to 50 mm, the width of the seal is L, the weight of the battery is M, and L and M satisfy: 0.0002 mm / kg ≤ L / M ≤ 5 mm / kg.

2. The battery according to claim 1, wherein The material of the sealing member includes foam material, and the width of the sealing member is 4mm-30mm.

3. The battery according to claim 1, wherein The material of the sealing member includes rubber, and the width of the sealing member is 1mm-20mm.

4. The battery according to claim 1, wherein When the sealing member is made of foam material, L and M satisfy the following conditions: 0.005 mm / kg≤L / M≤0.5 mm / kg.

5. The battery according to claim 1, wherein When the sealing member is made of rubber material, L and M satisfy the following conditions: 0.001 mm / kg≤L / M≤0.05 mm / kg.

6. The battery according to any one of claims 1 to 5, further comprising a box body, the box body having a second opening, the carrying member covering the second opening to form a second accommodating cavity with the box body; The battery cell is disposed in the second accommodating cavity.

7. The battery according to claim 6, wherein The supporting component includes a supporting plate and an annular plate. The supporting plate is used to cover the second opening to form the second accommodating cavity together with the box body. The annular plate is arranged on the side of the supporting plate away from the box body and forms the first accommodating cavity together with the supporting plate.

8. The battery according to claim 7, wherein The annular plate includes a side wall and a top wall. The top wall is arranged opposite to the supporting plate and encloses the first opening. The side wall is arranged around the top wall and connected to the supporting plate.

9. The battery according to claim 8, wherein The sealing member is fixedly connected to the top wall.

10. The battery according to claim 9, wherein The projection of the top wall on the sealing member along the thickness direction of the top wall covers the sealing member.

11. The battery according to claim 1, wherein The sealing element is an annular structure. 12 . The battery according to claim 1 , further comprising a control box, the control box being received in the first receiving cavity and electrically connected to the battery cell.

13. An electrical device comprising the battery according to any one of claims 1 to 12, wherein the battery is used to provide electrical energy.

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