Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, the battery comprises a first box body part, a second box body part, a battery monomer and a sealing element, the second box body part and the first box body part are mutually covered to define an accommodating cavity, the battery monomer is arranged in the accommodating cavity, and the sealing element is clamped between the first box body part and the second box body part. According to the structure, the sealing element is clamped between the first box body part and the second box body part which jointly define the accommodating cavity, so that the accommodating cavity in which the battery monomers are positioned is relatively good in sealing performance, and the battery has good sealing performance.

Description

Technical Field

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

[0002] Batteries have the advantages of high specific energy and high power density. They are widely used in electronic devices and transportation vehicles, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric tools, etc.

[0003] As the application fields of batteries continue to expand, batteries are used more and more frequently in special scenarios such as moisture and water. How to improve the sealing of batteries has attracted more and more attention from technicians in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a battery and an electrical device, wherein the battery has good sealing properties.

[0005] In the first aspect, some embodiments of the present application provide a battery, the battery comprising a first box body, a second box body, a battery cell and a seal, the second box body and the first box body cover each other to define a receiving cavity, the battery cell is arranged in the receiving cavity, and the seal is sandwiched between the first box body and the second box body. In the above structure, since the seal is sandwiched between the first box body and the second box body that jointly define the receiving cavity, the receiving cavity where the battery cell is located has good sealing performance, so that the battery has good sealing performance.

[0006] According to the battery provided in some embodiments of the present application, the elongation at break of the seal is A, A≥300%, so that the seal has good toughness and ductility, so that the seal can be more conveniently arranged along the covering position between the first box body portion and the second box body portion, and can achieve a 90° angle at the bend without rebounding, so that the seal can be conveniently arranged around the accommodating cavity and clamped between the first box body portion and the second box body portion.

[0007] According to the battery provided in some embodiments of the present application, A>400%, so that the seal can be conveniently arranged along the covering position between the first box body and the second box body, and is conveniently arranged around the accommodating cavity and clamped between the first box body and the second box body.

[0008] According to the battery provided in some embodiments of the present application, the seal is bonded to the first box body portion and the second box body portion; the peel strength between the seal and the second box body portion is smaller than the peel strength between the seal and the first box body portion, so that after the first box body portion and the second box body portion are separated, the seal is easier to separate from the second box body portion and temporarily adhere to the first box body portion, which facilitates the subsequent recovery of the seal.

[0009] According to the battery provided in some embodiments of the present application, the seal includes a colloid part and an isolation layer, the colloid part is bonded to the first box part; the isolation layer is arranged between the colloid part and the second box part, and separates at least part of the colloid part from the second box part.

[0010] By bonding the colloid part to the first box part, the isolation layer is arranged between the colloid part and the second box part, so that the isolation layer can separate at least part of the colloid part from the second box part, which is beneficial to reducing the peeling strength between the seal and the second box part, and can make the peeling strength between the seal and the second box part smaller than the peeling strength between the seal and the first box part.

[0011] According to the battery provided in some embodiments of the present application, the isolation layer is formed with a channel, the colloid part and the second box part are connected via the channel, the material of the colloid part can be bonded to the second box part through the isolation layer, so that the surface of the sealing member provided with the isolation layer can also be bonded to the second box part.

[0012] According to the battery provided in some embodiments of the present application, the surface roughness of the surface of the second box body part in contact with the isolation layer is Ra, 2μm≤Ra≤20μm, which not only allows the surface of the second box body part in contact with the isolation layer to form a channel by extruding the isolation layer to break the isolation layer, but also makes it unnecessary to perform additional mechanical processing on the surface of the second box body part to increase the surface roughness.

[0013] According to the battery provided in some embodiments of the present application, 5μm≤Ra≤15μm, so that the second box body can better form a channel by extruding the isolation layer to break the isolation layer, and also make it easier for the processed second box body to meet the surface roughness requirement of the second box body.

[0014] According to the battery provided in some embodiments of the present application, the isolation layer is configured to be non-adhesive, so that after the first box body and the second box body are separated, the seal is separated from the second box body, making the battery easy to disassemble.

[0015] According to the battery provided in some embodiments of the present application, the thickness of the isolation layer is L1, 1μm≤L1≤12μm, which not only allows the isolation layer to be more easily squeezed and destroyed by the second box body to achieve the penetration of the colloid material, but also makes the isolation layer have sufficient strength and is not easily damaged by vibration, bumps and other factors during transportation.

[0016] According to the battery provided in some embodiments of the present application, 2μm≤L1≤10μm, so that the isolation layer can be easily destroyed by the second box body and has sufficient strength and is not easily damaged during transportation.

[0017] According to the battery provided in some embodiments of the present application, the thickness of the colloid part is L2, 0.5mm≤L2≤5mm, which not only ensures that the colloid part has sufficient thickness to enable sufficient elastic deformation to achieve sealing of the covering position of the first box part and the second box part, but also ensures that the colloid part will not cause material waste due to being too thick.

[0018] According to the battery provided in some embodiments of the present application, 0.8 mm ≤ L2 ≤ 3 mm, which not only ensures that the colloid part has sufficient thickness to seal the covering position of the first box body part and the second box body part, but also avoids causing material waste.

[0019] According to the battery provided in some embodiments of the present application, the peel strength of the colloid part is C, C≥2N / cm, so that the colloid part has sufficient bonding strength, so that the bonding between the colloid part and the first box part can effectively improve the sealing of the seal on the covering position of the first box part and the second box part.

[0020] According to the battery provided in some embodiments of the present application, C≥3N / cm, so that the bonding between the colloid part and the first box part can better improve the sealing performance of the sealing member on the covering position of the first box part and the second box part.

[0021] According to the battery provided in some embodiments of the present application, the interface shear strength between the colloid part and the first box part is D, 0.05MPa≤D≤0.8MPa, which not only makes the bonding strength between the colloid part and the first box part effectively improve the sealing of the seal on the covering position of the first box part and the second box part, but also makes it possible for the staff to easily peel off the seal from the first box part by tearing it during the disassembly of the battery.

[0022] According to the battery provided in some embodiments of the present application, 0.1MPa≤D≤0.5MPa, which not only enables the adhesion of the seal on the first box body to effectively improve the sealing of the covering position of the first box body and the second box body, but also enables the seal to be easily removed from the first box body.

[0023] According to the battery provided in some embodiments of the present application, the isolation layer includes a polyurethane layer or a silicone layer, so that the isolation layer has good resilience, which is beneficial to improving the resilience of the seal, thereby helping to improve the sealing of the seal on the covering position of the first box body part and the second box body part.

[0024] According to the battery provided in some embodiments of the present application, the colloid part is a pressure-sensitive adhesive structure, so that after the colloid part is torn off from the second box part, the colloid part is not likely to remain on the second box part, which facilitates subsequent processing.

[0025] According to the battery provided in some embodiments of the present application, the battery also includes a connecting piece, which is connected to the first box body portion and the second box body portion, so that the sealing piece is pressed between the first box body portion and the second box body portion, so that the sealing piece can well seal the covering position of the first box body portion and the second box body portion.

[0026] In a second aspect, some embodiments of the present application further provide an electrical device, which includes a battery provided by any of the above technical solutions, and the battery is used to provide electrical energy.

[0027] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects:

[0028] The present application provides a battery, which includes a first box body, a second box body, a battery cell and a sealant, wherein the second box body and the first box body cover each other to define a receiving cavity, the battery cell is arranged in the receiving cavity, and the sealant is sandwiched between the first box body and the second box body. In the above structure, since the sealant is sandwiched between the first box body and the second box body that jointly define the receiving cavity, the receiving cavity where the battery cell is located has good sealing performance, so that the battery has good sealing performance.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0031] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0032] Figure 2 A disassembled diagram of a battery provided in some embodiments of the present application;

[0033] Figure 3 A schematic diagram of a portion of the structure of a battery provided in some embodiments of the present application;

[0034] Figure 4 A cross-sectional view of a seal provided in some embodiments of the present application.

[0035] In the attached figure:

[0036] 10. Box body; 101. First box body; 102. Second box body; 103. Accommodation chamber; 20. Battery cell; 30. Sealing member; 31. Colloid part; 32. Isolation layer; 1000. Vehicle; 100. Battery; 200. Controller; 300. Motor. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0038] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0039] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0040] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application fields, people's requirements for batteries are also constantly increasing.

[0044] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0045] The battery cell may be a secondary battery cell, which refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0046] The battery cells may be lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-hydrogen battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc.

[0047] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0048] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0049] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0050] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0051] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0052] As the application scope of batteries continues to expand, batteries are used more and more frequently in humid and water-related scenarios. In such scenarios, moisture in the external environment can easily enter the battery, affecting the reliability of the battery. Therefore, how to improve the sealing of batteries has attracted more and more attention from technicians in this field.

[0053] In order to improve the sealing performance of the battery, some embodiments of the present application provide a battery, which includes a first box body, a second box body, a battery cell and a sealant, wherein the second box body and the first box body cover each other and jointly define a receiving cavity, the battery cell is arranged in the receiving cavity, and the sealant is sandwiched between the first box body and the second box body. In the above structure, since the sealant is sandwiched between the first box body and the second box body that jointly define the receiving cavity, the receiving cavity where the battery cell is located has better sealing performance, so that the battery has good sealing performance.

[0054] The battery described in the embodiments of the present application is suitable for use in electrical devices using the battery.

[0055] Electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. Vehicles may be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles and spacecrafts, 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.

[0056] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in one embodiment of the present application.

[0057] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0058] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided for some embodiments of the present application. The battery 100 includes a housing 10 and a battery cell 20, and the battery cell 20 is accommodated in the housing 10. The housing 10 is used to provide a housing cavity 103 for the battery cell 20. There may be multiple battery cells 20 in the battery 100, and the multiple battery cells 20 may be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the housing 10; of course, the battery 100 may also be a battery module formed by first connecting multiple battery cells 20 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the housing 10.

[0060] The box body 10 may define a placement space for accommodating the battery cells 20. The box body 10 may be in various shapes, such as a rectangular parallelepiped, a cylinder, and the like.

[0061] The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for achieving electrical connection between the plurality of battery cells 20 .

[0062] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0063] Some embodiments of the present application provide a battery 100, such as Figure 3As shown, the battery 100 includes a first box body 101, a second box body 102, a battery cell 20 and a seal 30. The second box body 102 and the first box body 101 cover each other and together define a accommodating cavity 103. The battery cell 20 is arranged in the accommodating cavity 103, and the seal 30 is sandwiched between the first box body 101 and the second box body 102.

[0064] The first box body 101 and the second box body 102 can be part of the wall structure of the box body 10 in the above technical solution. The first box body 101 and the second box body 102 cover each other to define a receiving cavity 103 for receiving the battery cell 20. The first box body 101 and the second box body 102 can be in various shapes, such as a cuboid, a cylinder, etc. Among them, the first box body 101 can be a hollow structure with one side open, and the second box body 102 can also be a hollow structure with one side open. The open side of the second box body 102 covers the open side of the first box body 101, so as to form a box body 10 with a receiving cavity 103.

[0065] For example, the first box body 101 and the second box body 102 can be made of metal materials such as steel or aluminum alloy, or can be made of composite materials. The composite material can be a fiberboard, and the fibers included in the fiberboard can be glass fibers, which have good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. By coating the fibers with synthetic resin, the fibers and the synthetic resin coated thereon can be formed into a fiberboard by hot pressing.

[0066] Exemplarily, the fiberboard is formed as follows:

[0067] First, the glass fiber is impregnated with thermoplastic plastic to generate a composite unidirectional tape, and then a plurality of composite unidirectional tapes are overlapped and arranged, and finally the overlapped plurality of composite unidirectional tapes are hot pressed, and the thermoplastic plastics on the plurality of composite unidirectional tapes are combined into one after hot pressing to finally form a fiberboard.

[0068] When the first box body 101 and the second box body 102 are made of metal materials, they can be made of electrophoretic steel or electrophoretic aluminum, so that the surfaces of the first box body 101 and the second box body 102 are deposited into a paint film protective layer.

[0069] The accommodating cavity 103 can be used to accommodate, including but not limited to, the battery cell 20 , and can also be used to accommodate components such as a busbar component, so that the components in the battery 100 can be protected by the first box body 101 and the second box body 102 .

[0070] The battery 100 may include a plurality of battery cells 20 , which are disposed in the receiving cavity 103 and electrically connected to output electrical energy at a preset voltage.

[0071] The seal 30 may be a member for sealing the gap between the first box body 101 and the second box body 102. The seal 30 may be an elastic member, and by sandwiching the seal 30 between the first box body 101 and the second box body 102, the seal 30 can well seal the gap between the first box body 101 and the second box body 102 through its own elastic deformation.

[0072] In the above structure, since the seal 30 is sandwiched between the first box body 101 and the second box body 102 that jointly define the accommodating cavity 103, the accommodating cavity 103 where the battery cell 20 is located has good sealing performance, so that the battery 100 has good sealing performance.

[0073] In some embodiments, the elongation at break of the seal 30 is A, and A≧300%.

[0074] Since the greater the elongation at break of the seal 30, the better its ductility, by setting the range of the elongation at break A of the seal 30 to A≥300%, the seal 30 has good toughness and ductility, so that the seal 30 can be more conveniently arranged along the covering position between the first box body 101 and the second box body 102, and can achieve a 90° angle at the bend without rebound, so that the seal 30 can be conveniently arranged around the accommodating cavity 103 and clamped between the first box body 101 and the second box body 102.

[0075] For example, the elongation at break of the sealing member 30 may be measured according to the national standard GB / T 30776-2014. The specific measurement method may refer to the national standard GB / T 30776-2014 and will not be described in detail here.

[0076] In some embodiments, A>400%.

[0077] By setting the elongation at break A of the seal 30 to a range of A>400%, the seal 30 can be conveniently arranged along the covering position between the first box body 101 and the second box body 102, so as to be arranged around the accommodating cavity 103 and sandwiched between the first box body 101 and the second box body 102. Exemplarily, the elongation at break A of the seal 30 can be set to 500%, 600% or 700%, and those skilled in the art can set the value of the elongation at break A of the seal 30 according to actual conditions to make the seal 30 have good toughness and ductility.

[0078] In some embodiments, the seal 30 is bonded to the first box body 101 and the second box body 102 , and the peeling strength between the seal 30 and the second box body 102 is smaller than the peeling strength between the seal 30 and the first box body 101 .

[0079] By bonding the seal 30 to the first box body 101 and the second box body 102, the seal 30 can be positioned on the first box body 101 and the second box body 102 during the installation process and is not easy to fall off. This not only makes it convenient to install the seal 30 between the first box body 101 and the second box body 102, but also helps to improve the sealing performance of the seal 30 on the covering position of the first box body 101 and the second box body 102.

[0080] By setting the peel strength between the seal 30 and the second box body 102 to be smaller than the peel strength between the seal 30 and the first box body 101, after the first box body 101 and the second box body 102 are separated, the seal 30 is easier to detach from the second box body 102 and temporarily adhere to the first box body 101, which facilitates the subsequent recovery of the seal 30.

[0081] Exemplarily, the peel strength between the seal 30 and the second box body 102 and the peel strength between the seal 30 and the first box body 101 can be measured according to the ASTM-D3330 pressure-sensitive tape peel strength test standard, which will not be described in detail here.

[0082] In some embodiments, the seal 30 includes a colloid portion 31 and an isolation layer 32 , the colloid portion 31 is bonded to the first box body 101 , and the isolation layer 32 is disposed between the colloid portion 31 and the second box body 102 and separates at least a portion of the colloid portion 31 from the second box body 102 .

[0083] The colloid part 31 may be the main body of the sealing member 30, which is an elastic adhesive with adhesiveness. The isolation layer 32 is a structural layer stacked with the colloid part 31, and the isolation layer 32 is far away from the first box body 101 relative to the colloid part 31, and is used to separate at least part of the colloid part 31 from the second box body 102. By bonding the colloid part 31 to the first box body 101, the isolation layer 32 is arranged between the colloid part 31 and the second box body 102, so that the isolation layer 32 can separate at least part of the colloid part 31 from the second box body 102, which is conducive to reducing the peeling strength between the sealing member 30 and the second box body 102, and can make the peeling strength between the sealing member 30 and the second box body 102 less than the peeling strength between the sealing member 30 and the first box body 101.

[0084] In some embodiments, the isolation layer 32 is formed with a channel, and the colloid portion 31 and the second box portion 102 are connected via the channel.

[0085] The channel can be a structure provided on the isolation layer 32 for passing the material of the colloid part 31 , which enables the material of the colloid part 31 to pass through the isolation layer 32 and adhere to the second box body 102 , so that the surface of the sealing member 30 provided with the isolation layer 32 can also adhere to the second box body 102 .

[0086] Exemplarily, the channel can be formed by extruding the seal 30 by the first box body 101 and the second box body 102. During the extrusion of the seal 30 by the first box body 101 and the second box body 102, the isolation layer 32 is damaged to form a hole, and the material of the colloid part 31 can pass through the isolation layer 32 through the hole and adhere to the second box body 102.

[0087] In some embodiments, the surface roughness of the second housing 102 contacting the isolation layer 32 is Ra, 2 μm≤Ra≤20 μm.

[0088] By setting the range of the surface roughness Ra of the surface of the second box body 102 that contacts the isolation layer 32 to 2μm≤Ra≤20μm, not only can the surface of the second box body 102 that contacts the isolation layer 32 be able to break the isolation layer 32 to form a channel by squeezing the isolation layer 32, but also the surface of the second box body 102 does not need to be additionally machined to increase the surface roughness.

[0089] For example, the surface roughness of the surface of the second box body 102 that contacts the isolation layer 32 can be measured using a stylus surface roughness measuring instrument using a stylus measurement method.

[0090] In some embodiments, 5 μm ≤ Ra ≤ 15 μm.

[0091] By setting the range of the surface roughness Ra of the surface of the second box 102 in contact with the isolation layer 32 to 5μm≤Ra≤15μm, the second box 102 can better form a channel by extruding the isolation layer 32 to break the isolation layer 32, and the processed second box 102 can more easily meet the surface roughness requirements of the second box 102. Exemplarily, the surface roughness Ra of the surface of the second box 102 in contact with the isolation layer 32 can be set to 8μm, 10μm or 12μm. Those skilled in the art can set the value of the surface roughness Ra of the surface of the second box 102 in contact with the isolation layer 32 according to actual conditions, so that the second box 102 can form a channel by extruding the isolation layer 32 to break the isolation layer 32.

[0092] In some embodiments, the release layer 32 is formulated to be non-adhesive.

[0093] By configuring the isolation layer 32 to be non-adhesive, the isolation layer 32 can reduce the peeling strength between the seal 30 and the second box body 102, so that after the first box body 101 and the second box body 102 are separated, the seal 30 and the second box body 102 can be separated, making it easy to disassemble the battery 100.

[0094] In some embodiments, Figure 4 As shown, the thickness of the isolation layer 32 is L1, 1 μm≤L1≤12 μm.

[0095] By setting the thickness L1 of the isolation layer 32 to the range of 1μm≤L1≤12μm, not only can the isolation layer 32 be more easily squeezed and destroyed by the second box body 102 to achieve the penetration of the colloid part 31 material, but the isolation layer 32 also has sufficient strength and is not easily damaged by vibration, bumps and other factors during transportation.

[0096] In some embodiments, 2 μm≤L1≤10 μm.

[0097] By setting the thickness L1 of the isolation layer 32 to a range of 2μm≤L1≤10μm, the isolation layer 32 can be easily destroyed by the second box 102 and has sufficient strength to be not easily damaged during transportation. For example, the thickness L1 of the isolation layer 32 can be set to 3μm, 5μm or 8μm. Those skilled in the art can set the value of the thickness L1 of the isolation layer 32 according to actual conditions so that the isolation layer 32 can be easily destroyed by the second box 102.

[0098] In some embodiments, the thickness of the colloid portion 31 is L2, 0.5 mm≤L2≤5 mm.

[0099] By setting the thickness L2 of the colloid part 31 to a range of 0.5 mm ≤ L2 ≤ 5 mm, not only the colloid part 31 has sufficient thickness to enable sufficient elastic deformation to achieve sealing of the covering position of the first box body 101 and the second box body 102, but also the colloid part 31 will not cause material waste due to being too thick.

[0100] In some embodiments, 0.8 mm ≤ L2 ≤ 3 mm.

[0101] By setting the range of the thickness L2 of the colloid part 31 to 0.8 mm ≤ L2 ≤ 3 mm, not only the colloid part 31 has sufficient thickness to seal the covering position of the first box body 101 and the second box body 102, but also it is not easy to cause material waste. Exemplarily, the thickness L2 of the colloid part 31 can be set to 0.8 mm, 2 mm or 2.5 mm. Those skilled in the art can set the value of the thickness L2 of the colloid part 31 according to actual conditions, so that the colloid part 31 can seal the covering position of the first box body 101 and the second box body 102.

[0102] In some embodiments, the peel strength of the colloid part 31 is C, where C≥2N / cm.

[0103] By setting the range of the peel strength C of the colloid part 31 to C≥2N / cm, the colloid part 31 has sufficient bonding strength, so that the bonding between the colloid part 31 and the first box body 101 can effectively improve the sealing performance of the sealing member 30 on the covering position of the first box body 101 and the second box body 102.

[0104] For example, the peel strength of the colloid part 31 can refer to the standard sample preparation and test method in the ASTM-D3330 pressure-sensitive tape peel strength test standard. The interface bonded to the colloid part 31 can be an electrophoretic interface (the interface bonded to the colloid part 31 can be an electrophoretic aluminum interface or an electrophoretic steel interface), and the test speed can be 300 mm / min.

[0105] In some embodiments, C ≥ 3 N / cm.

[0106] By setting the range of the peel strength C of the colloid part 31 to C≥3N / cm, the bonding between the colloid part 31 and the first box body 101 can better improve the sealing performance of the sealing member 30 on the covering position of the first box body 101 and the second box body 102. Exemplarily, the peel strength C of the colloid part 31 can be set to 4N / cm, 5N / cm or 6N / cm, and those skilled in the art can set the value of the peel strength C of the colloid part 31 according to actual conditions, so that the colloid part 31 can better seal the covering position of the first box body 101 and the second box body 102.

[0107] In some embodiments, the interface shear strength between the colloid portion 31 and the first box body 101 is D, 0.05 MPa≤D≤0.8 MPa.

[0108] By setting the range of the interface shear strength D between the colloid part 31 and the first box body 101 to 0.05MPa≤D≤0.8MPa, not only the bonding strength between the colloid part 31 and the first box body 101 can effectively improve the sealing performance of the sealing member 30 on the covering position of the first box body 101 and the second box body 102, but also during the disassembly process of the battery 100, the staff can easily peel off the sealing member 30 from the first box body 101 by tearing it off.

[0109] For example, the interface shear strength between the colloid part 31 and the first box body 101 can be measured according to the national standard GB / T 7124-2008, and the specific measurement method can be carried out with reference to the national standard GB / T 7124-2008. The interface bonded to the colloid part 31 can be an electrophoretic interface (the interface bonded to the colloid part 31 can be an electrophoretic aluminum interface or an electrophoretic steel interface), and the test speed can be 50 mm / min.

[0110] For example, the staff can tear the seal 30 from the first box body 101 by tearing the seal 30 in a direction at a preset angle to the bonding plane. The preset angle can be less than 30°, so that the seal 30 can be quickly separated from the first box body 101.

[0111] In some embodiments, 0.1 MPa≤D≤0.5 MPa.

[0112] By setting the range of the interface shear strength D between the colloid part 31 and the first box body 101 to 0.1MPa≤D≤0.5MPa, not only can the bonding of the seal 30 on the first box body 101 effectively improve the sealing performance of the covering position of the first box body 101 and the second box body 102, but also the seal 30 can be easily removed from the first box body 101. Exemplarily, the interface shear strength D between the colloid part 31 and the first box body 101 can be set to 0.2MPa, 0.3MPa or 0.4MPa, and those skilled in the art can set the value of the interface shear strength D between the colloid part 31 and the first box body 101 according to actual conditions, so that the seal 30 can not only improve the sealing performance of the covering position of the first box body 101 and the second box body 102, but also be easy to tear off.

[0113] In some embodiments, the isolation layer 32 includes a polyurethane layer or a silicone layer.

[0114] Polyurethane and silicone have good resilience and mechanical properties. The isolation layer 32 is made of polyurethane and silicone, so that the isolation layer 32 has good resilience, which is beneficial to improve the resilience of the seal 30, thereby helping to improve the sealing of the seal 30 on the covering position of the first box body 101 and the second box body 102.

[0115] Exemplarily, the isolation layer 32 can be formed by coating a polyurethane coating or a silicone coating on the surface of the colloid part 31 facing the second box body 102 . This method makes it easy to control the thickness of the isolation layer 32 .

[0116] In some embodiments, the adhesive portion 31 is a pressure-sensitive adhesive structure.

[0117] Since the pressure-sensitive adhesive can immediately adhere to the surface of the adherend under pressure, and does not contaminate the surface of the adherend after destroying the adhesive surface of the adherend, the colloid part 31 is not likely to remain on the second box body 102 after being torn off from the second box body 102, which facilitates subsequent processing.

[0118] Exemplarily, the pressure-sensitive adhesive may include an acrylate pressure-sensitive adhesive or a rubber system pressure-sensitive adhesive, wherein the rubber system pressure-sensitive adhesive may be a natural rubber pressure-sensitive adhesive, a synthetic rubber, a silicone pressure-sensitive adhesive or a recycled rubber pressure-sensitive adhesive.

[0119] In some embodiments, the battery 100 further includes a connector connected to the first box body 101 and the second box body 102 .

[0120] The connecting piece is connected to the first box body 101 and the second box body 102, locking the first box body 101 and the second box body 102 with each other, so that the sealing piece 30 is pressed between the first box body 101 and the second box body 102, so that the sealing piece 30 can well seal the covering position of the first box body 101 and the second box body 102.

[0121] In some embodiments, the connector may also pass through the seal 30 to tightly connect the first box body 101 and the second box body 102 , so that the seal 30 can be more evenly squeezed by the first box body 101 and the second box body 102 .

[0122] Exemplarily, the connecting member may be a connecting bolt, which connects and locks the first box body 101 and the second box body 102 , so that the first box body 101 and the second box body 102 can clamp the sealing member 30 .

[0123] The performance of the battery 100 provided in the specific embodiment of the present application is further illustrated by experiments below.

[0124] In this experiment, the battery 100 is used as the experimental object to test the sealing and disassembly of the battery 100, and the peel strength and interface shear strength of the bonding between the seal 30 and the first box 101. The thickness of the seal 30 is 1 mm, and the first box 101 and the second box 102 are both made of electrophoretic steel, so that the bonding interface between the seal 30 and the first box 101 is an electrophoretic interface.

[0125] The peel strength of the adhesive bond between the colloid part 31 and the first box body 101 can refer to the standard sample preparation and test method in the ASTM-D3330 pressure-sensitive tape peel strength test standard, and the test speed can be 300 mm / min. The interface shear strength between the colloid part 31 and the first box body 101 can be measured according to the national standard GB / T 7124-2008, and the test speed can be 50 mm / min. The method for measuring the sealing of the battery 100 is to place the battery 100 in 1m deep water for 48 hours and then measure whether water has entered.

[0126] The differences in parameters of the various embodiments in this experiment are as follows:

[0127] Example 1

[0128] The isolation layer 32 is a polyurethane layer, and the thickness L1 of the isolation layer 32 is 3 μm; the colloid part 31 is an acrylic pressure-sensitive adhesive.

[0129] Example 2

[0130] The isolation layer 32 is a silicone layer, and the thickness L1 of the isolation layer 32 is 5 μm; the colloid part 31 is an acrylic pressure-sensitive adhesive.

[0131] Example 3

[0132] The isolation layer 32 is a silicone layer, and the thickness L1 of the isolation layer 32 is 3 μm; the colloid part 31 is a silicone pressure-sensitive adhesive.

[0133] Table 1 shows the sealing performance, detachability, and peel strength and interface shear strength of the sealing member 30 and the first box body 101 of the battery 100 in each embodiment of the experiment of this application. As shown in Table 1, it can be seen from Embodiment 1, Embodiment 2 and Embodiment 3 that the battery 100 not only has good sealing performance and is not easy to be infiltrated with water, but also the sealing member 30 therein can be detached without generating residual glue, and the second box body 102 can be directly glued for a second time.

[0134] Some embodiments of the present application also provide an electric device, which includes the battery 100 provided by the above technical solution, and the battery 100 is used to provide electric energy.

[0135] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0136] According to some embodiments of the present application, the present application provides a battery 100, which includes a first box body 101, a second box body 102, a battery cell 20, a seal 30 and a connector. The second box body 102 and the first box body 101 cover each other and jointly define a accommodating cavity 103. The battery cell 20 is arranged in the accommodating cavity 103. The connector is connected to the second box body 102 and the first box body 101. The seal 30 is clamped between the first box body 101 and the second box body 102. The elongation at break of the seal 30 is A, A>400%, and the peel strength between the seal 30 and the second box body 102 is less than the peel strength between the seal 30 and the first box body 101. The sealing member 30 includes a colloid portion 31 bonded to the first box body 101 and an isolation layer 32 disposed between the colloid portion 31 and the second box body 102. The colloid portion 31 is a pressure-sensitive adhesive structure. The isolation layer 32 is non-adhesive and has a channel formed thereon. The colloid portion 31 and the second box body 102 are connected via the channel. The surface roughness of the surface of the second box body 102 in contact with the isolation layer 32 is Ra, 5μm≤Ra≤15μm, the thickness of the isolation layer 32 is L1, 2μm≤L1≤10μm, the thickness of the colloid portion 31 is L2, 0.8mm≤L2≤3mm, the peel strength of the colloid portion 31 is C, C≥3N / cm, and the interface shear strength between the colloid portion 31 and the first box body 101 is D, 0.1MPa≤D≤0.5MPa.

[0137] In the above structure, the seal 30 has good toughness and ductility, so that the seal 30 can be easily arranged along the covering position between the first box body 101 and the second box body 102, and can achieve a 90° angle at the bend without rebounding, so that the seal 30 can be easily arranged around the accommodating cavity 103 and clamped between the first box body 101 and the second box body 102; the bonding of the colloid part 31 in the seal 30 and the first box body 101 can improve the sealing of the battery 100, and the isolation layer 32 can facilitate the disassembly of the first box body 101 and the second box body 102; at the same time, the seal 30 can be easily removed from the first box body 101 by tearing.

[0138] Table 1

[0139]

[0140] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: a first housing portion; a second box body portion, which covers the first box body portion and defines a receiving cavity together; A battery cell, disposed in the accommodation cavity; The sealing member is sandwiched between the first box body portion and the second box body portion.

2. The battery according to claim 1, characterized in that The breaking elongation of the sealing member is A, and A is ≥ 300%.

3. The battery according to claim 1, characterized in that A＞400％。 4. The battery according to claim 1, characterized in that The sealing member is bonded to the first box body portion and the second box body portion; The peeling strength between the sealing member and the second box body portion is smaller than the peeling strength between the sealing member and the first box body portion.

5. The battery according to claim 4, characterized in that The sealing member comprises: A colloid part, bonded to the first box part; and The isolation layer is disposed between the colloid part and the second box part, and isolates at least a portion of the colloid part from the second box part.

6. The battery according to claim 5, characterized in that The isolation layer is formed with a channel, and the colloid part and the second box part are connected via the channel.

7. The battery according to claim 5, characterized in that The surface roughness of the second housing portion contacting the isolation layer is Ra, 2 μm≤Ra≤20 μm.

8. The battery according to claim 7, characterized in that 5μm≤Ra≤15μm.

9. The battery according to claim 5, characterized in that The isolation layer is configured to be non-adhesive.

10. The battery according to claim 5, characterized in that The thickness of the isolation layer is L1, 1 μm≤L1≤12 μm.

11. The battery according to claim 10, characterized in that 2μm≤L1≤10μm.

12. The battery according to claim 5, characterized in that The thickness of the colloid part is L2, 0.5mm≤L2≤5mm.

13. The battery according to claim 12, characterized in that 0.8mm≤L2≤3mm.

14. The battery according to claim 5, characterized in that The peel strength of the colloid part is C, C≥2N / cm.

15. The battery according to claim 14, characterized in that C≥3N / cm.

16. The battery according to claim 5, characterized in that The interface shear strength between the colloid part and the first box part is D, 0.05MPa≤D≤0.8MPa.

17. The battery according to claim 16, characterized in that 0.1MPa≤D≤0.5MPa.

18. The battery according to any one of claims 5 to 17, characterized in that The isolation layer includes a polyurethane layer or a silicone layer.

19. The battery according to any one of claims 5 to 17, characterized in that The colloid part is a pressure-sensitive adhesive structure.

20. The battery according to any one of claims 5 to 17, characterized in that The battery further includes a connector connected to the first box body and the second box body.

21. An electrical device, characterized in that: The battery comprises a battery as claimed in any one of claims 1 to 20, wherein the battery is used to provide electrical energy.

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