Battery box, battery and electric device

Abstract

The embodiment of the utility model provides a battery box, a battery and a power utilization device, the battery box comprises a box body, a box cover, a sealing layer and a structural adhesive layer, the box body is provided with a mounting space, and one side of the mounting space is opened to form an opening; the box cover is used for covering the opening; the sealing layer is clamped between the box cover and the box body in the covering direction of the box cover and annularly arranged on the outer side, perpendicular to the covering direction of the box cover, of the opening so as to seal the installation space. The structural adhesive layer is arranged on the side, perpendicular to the covering direction of the box cover, of the sealing layer and used for bonding the box body and the box cover. According to the battery box disclosed by the embodiment of the invention, the effect of isolating the mounting space from the outside is realized through the sealing layer, so that the contact area of the sealing layer and external foreign matters is reduced, and the service life of the sealing layer is prolonged; the process for coating the structural adhesive layer is simple, and the production efficiency can be improved; and the box cover and the box body can be bonded again in a manner of re-coating the structural adhesive layer, so that the box cover and the box body can be reused.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and specifically to a battery box, a battery, and an electrical device. Background Art

[0002] In recent years, with the vigorous development of new energy, the demand for batteries has also increased day by day.

[0003] The battery consists of a battery box and a battery cell. The battery cell is placed in the battery box, and the battery's charge and discharge functions are achieved through the electrochemical reaction in the battery cell. The battery box provides a closed environment for the battery cell, reducing the chance of foreign matter from the outside entering the battery box and causing adverse effects on the battery cell, control system and other devices.

[0004] The battery box includes a box cover and a box body. The box body is provided with an installation space with one side open. Battery cells, control systems and other devices in the battery are placed in the installation space. The box cover is set at the open part of the installation space to make the installation space airtight.

[0005] In the related art, the box cover and the box body are fixed by bolts and nuts, and foreign matter can easily penetrate through the matching positions of the bolts and nuts with the box body and the box cover, causing sealing failure and affecting the service life of the battery. Utility Model Content

[0006] In view of this, the embodiments of the present application hope to provide a battery box, a battery and an electrical device with good sealing performance.

[0007] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0008] An embodiment of the present application provides a battery box, the battery box comprising:

[0009] The box body is provided with an installation space, one side of the installation space is opened to form an opening;

[0010] A box cover, used to cover the opening;

[0011] A sealing layer is sandwiched between the box cover and the box body along the covering direction of the box cover, and is arranged around the outer side of the opening perpendicular to the covering direction of the box cover to seal the installation space;

[0012] The structural adhesive layer is arranged on a side of the sealing layer that is perpendicular to the covering direction of the box cover, and the structural adhesive layer is used to bond the box body and the box cover.

[0013] The battery box in the embodiment of the present application is provided with a sealing layer and a structural adhesive layer at the joint position of the box cover and the box body. The sealing layer surrounds the opening to isolate the installation space from the outside world, thereby reducing the probability of foreign matter from the outside entering the installation space through the joint position of the box cover and the box body. At the same time, only the outer side of the sealing layer perpendicular to the direction of the box cover can directly face the outside world, which is beneficial to reducing the area where the sealing layer contacts foreign matter from the outside world and is beneficial to extending the service life of the sealing layer. The relative positions of the box cover and the box body are bonded and fixed by the structural adhesive layer. On the one hand, the process of coating the structural adhesive layer is simple, which is convenient for completing the operation in one time, which is beneficial to improving the efficiency of fixing the box cover and the box body, is beneficial to using automated equipment for operation, and is beneficial to improving production efficiency. On the other hand, in the subsequent maintenance and overhaul of the battery, after the box cover and the box body are disassembled, the box cover and the box body can be re-bonded by re-coating the structural adhesive layer, which is beneficial to reuse the box cover and the box body and is beneficial to reducing the subsequent use cost.

[0014] In some embodiments, the sealing layer and the structural adhesive layer are spaced apart from each other perpendicular to a covering direction of the box cover.

[0015] In this way, a gap is left between the sealing layer and the structural adhesive layer to reduce the probability of adhesion between the structural adhesive layer and the sealing layer, thereby reducing the probability of damage to the sealing layer caused by the structural adhesive layer pulling the sealing layer during the process of separating the box cover and the box body.

[0016] In some embodiments, the structural adhesive layer is disposed on the inner side of the sealing layer perpendicular to the covering direction of the box cover.

[0017] In this way, the sealing effect of the sealing layer can reduce the probability of foreign matter from the outside coming into contact with the structural adhesive layer, thereby helping to extend the service life of the structural adhesive layer and keep the box cover and the box body in a fixed state.

[0018] In some embodiments, the material of the sealing layer is one of butyl rubber, silicone rubber, and fluororubber, so that the sealing layer has good elasticity and sealing properties and is non-sticky;

[0019] And / or, the material of the structural adhesive layer is one of epoxy structural adhesive, acrylic adhesive, polyurethane adhesive, and silicone adhesive, so as to achieve the purpose of bonding and fixing the box cover and the box body with the structural adhesive layer.

[0020] In some embodiments, the dimension of the sealing layer perpendicular to its extension direction is a first dimension, and the value range of the first dimension is 8 mm to 12 mm, so that the sealing layer can meet the sealing performance requirements while improving the compactness of the overall structure;

[0021] And / or, a dimension of the structural adhesive layer perpendicular to the extension direction of the sealing layer is a second dimension, and a value range of the second dimension is 8 mm to 12 mm, so that the bonding force of the structural adhesive layer can meet the requirements of bonding and fixing the box cover and the box body while improving the compactness of the overall structure.

[0022] In some embodiments, there are multiple structural adhesive layers, and the multiple structural adhesive layers are arranged at intervals along the extension direction of the sealing layer.

[0023] In this way, while the structural adhesive layer realizes bonding between the box cover and the box body, the amount of structural adhesive required can be reduced, thereby reducing costs.

[0024] In some embodiments, the gap size between two adjacent structural adhesive layers along the extension direction of the sealing layer is a third size, the size of the structural adhesive layer along the extension direction of the sealing layer is a fourth size, and the third size is not less than the fourth size.

[0025] In this way, after the battery box is disassembled multiple times, there are still positions on the box cover and the box body that can be used to apply the structural adhesive, which helps to avoid the newly applied structural adhesive being located at the broken position of the previous structural adhesive layer, reduces the difficulty of applying the structural adhesive, and helps to ensure that the subsequent bonding strength between the box cover and the box body meets the requirements.

[0026] In some embodiments, the box body is provided with a side surface of the opening and a side surface of the box cover facing the opening, one of which is provided with a limiting protrusion, and when the box cover is closed on the opening, the limiting protrusion abuts against the other of the two along the covering direction of the box cover, and the sealing layer and the structural adhesive layer are respectively located on opposite sides of the limiting protrusion perpendicular to the covering direction of the box cover.

[0027] In this way, on the one hand, the size of the gap between the box body and the box cover can be controlled by the limiting protrusion, which is beneficial to preventing the sealing layer from being over-compressed when the box cover is placed on the box body, thereby reducing the probability of damage caused by excessive compression force on the sealing layer; on the other hand, the limiting protrusion can constrain the flow direction of the structural adhesive during the coating process of the structural adhesive, thereby reducing the probability of contact between the structural liquid and the sealing layer.

[0028] In some embodiments, the number of the limiting protrusion is one, and the limiting protrusion is arranged around the outer side of the opening perpendicular to the covering direction of the box cover. The limiting protrusion can block the flow of the structural adhesive in any direction perpendicular to the covering direction of the box cover, further effectively reducing the probability of the structural adhesive contacting the sealing layer due to the flow;

[0029] Alternatively, there are multiple limiting protrusions, and the multiple limiting protrusions are spaced apart along the extension direction of the sealing layer, so that during the coating process of the structural adhesive, excess structural adhesive can enter the gap between two adjacent limiting protrusions, thereby reducing the probability of excess structural adhesive flowing into the installation space and contacting other devices in the battery and causing adverse effects.

[0030] In some embodiments, the sealing layer and the limiting protrusion are fitted perpendicularly to the extension direction of the sealant, which is conducive to reducing the overall size of the sealing layer and the limiting protrusion in the direction perpendicular to the extension direction of the sealant, thereby making the structure of the battery box compact and improving the adaptability of the battery box;

[0031] And / or, the sealing layer and the limiting protrusion are fitted perpendicularly to the extension direction of the sealant, which is beneficial to reduce the overall size of the structural adhesive layer and the limiting protrusion in the direction perpendicular to the extension direction of the sealant, and further helps to make the structure of the battery box compact and improve the adaptability of the battery box.

[0032] In some embodiments, the dimension of the limiting protrusion perpendicular to the extension direction of the sealing layer is a fifth dimension, and the value range of the fifth dimension is 8 mm to 12 mm, so that there is a sufficient distance between the sealing layer and the structural adhesive layer, reducing the probability of the structural adhesive coming into contact with the sealing layer after overflowing the limiting protrusion before curing;

[0033] And / or, the dimension of the limiting protrusion along the covering direction of the box cover is a sixth dimension, and the value range of the sixth dimension is 0.8mm to 1.2mm. In this way, the probability of the structural adhesive overflowing the limiting protrusion before curing is reduced, and at the same time, the gap size between the box cover and the box body is minimized as much as possible when the box cover is closed on the box body.

[0034] An embodiment of the present application further provides a battery, comprising a battery cell and the battery box of any one of the aforementioned embodiments, wherein the battery cell is disposed in the installation space.

[0035] In this way, the sealing layer in the battery box provides a closed environment for the battery cells, reducing the adverse effects of foreign matter entering the installation space on the normal operation of the battery, improving the safety of the battery, and extending the battery life. At the same time, by destroying the structural adhesive layer, the battery box can be disassembled to inspect and maintain the battery cells, and the box cover and the box body can be re-fixed and connected by re-coating the structural adhesive, so that the battery can be reused.

[0036] An embodiment of the present application further provides an electrical device, characterized in that the electrical device comprises the battery in the aforementioned embodiment, and the battery is used as a power source for the electrical device.

[0037] In this way, by improving the sealing performance of the installation space, the service life of the battery power source can be effectively improved, so that the battery can supply power to other devices in the electrical device more stably and permanently. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of an electric device being a vehicle in one embodiment of the present application;

[0039] Figure 2 A schematic diagram of a battery in an embodiment of the present application;

[0040] Figure 3 This is a schematic diagram of a box cover in one embodiment of the present application;

[0041] Figure 4 for Figure 3 A partial enlarged schematic diagram of position A in the middle;

[0042] Figure 5 This is a schematic diagram of a box and a battery cell in an embodiment of the present application;

[0043] Figure 6 for Figure 5 A partial enlarged schematic diagram of position B in the middle;

[0044] Figure 7 It is a partial cross-sectional schematic diagram of a battery in one embodiment of the present application.

[0045] Description of Reference Numerals

[0046] 1000, vehicle; 100, battery; 200, controller; 300, motor;

[0047] 10. Battery box; 11. Box body; 11a. Installation space; 11b. Opening; 111. First folded edge; 12. Box cover; 121. Second folded edge; 13. Sealing layer; 13a. First size; 14. Structural adhesive layer; 14a. Second size; 14b. Third size; 14c. Fourth size; 15. Limiting protrusion; 15a. Fifth size; 15b. Sixth size; 20. Battery cell. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship 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.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, for the convenience of explanation, Figure 2 and Figure 7 As shown, the direction indicated by the arrow X is the "covering direction"; the opposite direction indicated by the arrow X along the covering direction is called "up" and "top".

[0054] 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 those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0056] The battery cell involved in the embodiment of the present application includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer, and the current collector not coated with the positive electrode active material layer is stacked as a positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, the current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer, and the current collector not coated with the negative electrode active material layer is stacked as a negative electrode tab. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon, etc. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure.

[0057] The battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged.

[0058] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0059] The battery cells may be cylindrical battery cells, prismatic battery cells, soft-pack battery cells or battery cells of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries, etc. There are no particular limitations in the embodiments of the present application.

[0060] The battery involved 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.

[0061] The electric devices involved in the embodiments of the present application are powered by the above-mentioned batteries, and the electric devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0062] In the following embodiments, for the convenience of description, an electric device according to an embodiment of the present application is taken as an example of a vehicle 1000. The following is a description with reference to the accompanying drawings.

[0063] Figure 1 The structure diagram of a vehicle 1000 provided in one embodiment of the present application is shown in FIG. 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. Figure 1 As shown, a battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can 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 operating power requirements of the vehicle 1000 during driving.

[0064] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000 , but also 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 .

[0065] Below, the embodiments of the present application are described in detail.

[0066] At present, batteries are increasingly used in life and industry. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, and aerospace and other fields. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0067] The battery includes a battery box and a battery cell. The battery box is provided with an installation space, and the battery cell is placed in the installation space so that the battery cell has a closed working environment, thereby reducing the probability of corrosion caused by contact with foreign matter such as rainwater and salt spray from the outside, which is beneficial to the stable operation of the battery cell and prolongs the service life of the battery.

[0068] The battery box includes a box cover and a box body. After the battery cells are placed in the box body through the opening of the box body and are electrically connected and electrically tested with other devices in the battery, the box cover is placed on the box body so that the box cover and the box body are jointly enclosed to form an installation space.

[0069] In order to achieve airtightness between the installation space and the outside world, a sealing layer is coated on the fitting position between the box cover and the box body.

[0070] In the related art, in order to fix the box cover to the box body, through holes that can communicate with each other along the covering direction of the box cover are respectively provided around the opening of the box body and the corresponding positions of the box cover, and bolts pass through the through holes and nuts to fix the box cover and the box body.

[0071] Since there are gaps between the contact positions between the bolts and nuts and the box cover and the box body respectively, foreign matter such as water vapor and salt spray from the outside can penetrate through the gaps, thereby coming into contact with the sealing layer and causing corrosion and aging to the sealing layer, seriously affecting the sealing performance of the sealing layer and easily causing the sealing environment in the installation space to be destroyed; in addition, in order to ensure the sealing performance and the stability of the fixation, multiple bolts and nuts need to be set around the opening. The installation time of the bolts and nuts is long, which is not conducive to quick assembly and affects the production efficiency.

[0072] In order to solve the above problems, the embodiment of the present application provides a battery box, in which a sealing layer and a structural adhesive layer are provided between the box cover and the box body, the sealing layer is used to seal the joint between the box cover and the box body, and the structural adhesive is used to bond and fix the box cover and the box body. In this way, the sealing of the installation space can be achieved without the need to provide bolts and nuts, and the production efficiency in the production process is improved.

[0073] Specifically, see Figures 2 to 7 The present application provides a battery box 10 for placing a battery cell 20 . The battery box 10 includes a box body 11 , a box cover 12 , a sealing layer 13 and a structural adhesive layer 14 .

[0074] The box body 11 is provided with an installation space 11a, and one side of the installation space 11a is opened to form an opening 11b;

[0075] The box cover 12 is used to cover the opening 11b;

[0076] The sealing layer 13 is sandwiched between the box cover 12 and the box body 11 along the covering direction of the box cover 12, and is arranged around the outer side of the opening 11b perpendicular to the covering direction of the box cover 12 to seal the installation space 11a;

[0077] The structural adhesive layer 14 is disposed on one side of the sealing layer 13 that is perpendicular to the covering direction of the box cover 12 . The structural adhesive layer 14 is used to bond the box body 11 and the box cover 12 .

[0078] The installation space 11a is used to place components such as the battery cells 20, thermal management components, and BMS (Battery Management System) system in the battery 100, and plays a certain protective role while providing installation locations for each component.

[0079] The opening 11 b is used to provide a passage for placing various components into the installation space 11 a.

[0080] The box cover 12 is used to cover the opening 11 b so that the components in the installation space 11 a cannot escape from the opening 11 b.

[0081] The sealing layer 13 is squeezed by the box cover 12 and the box body 11 along the covering direction of the box cover 12 , so that the sealing layer 13 and the box cover 12 as well as the sealing layer 13 and the box body 11 are fitted together.

[0082] It can be understood that the structure of the sealing layer 13 itself can prevent gas and liquid from passing through its opposite sides.

[0083] The sealing layer 13 is annular and surrounds the boundary of the opening 11 b , so that the sealing layer 13 can block the gas and liquid exchange between the sealed space and the outside in any direction perpendicular to the covering direction of the box cover 12 .

[0084] It can be understood that, on the projection plane perpendicular to the covering direction of the box cover 12 , the projection of the opening 11 b is located within the projection range of the sealing layer 13 .

[0085] The sealing layer 13 seals the installation space 11 a , which means that the sealing layer 13 makes it possible for no gap at least in a macroscopic sense to exist between the box cover 12 and the box body 11 , so that the installation space 11 a is airtight.

[0086] The structural adhesive layer 14 refers to a solid structure formed after the structural adhesive is cured.

[0087] The structural adhesive layer 14 is connected between the box body 11 and the box cover 12 , and fixes the relative position between the box body 11 and the box cover 12 through its own adhesiveness.

[0088] The battery box 10 in the embodiment of the present application is provided with a sealing layer 13 and a structural adhesive layer 14 at the joint position between the box cover 12 and the box body 11. The sealing layer 13 surrounds the opening 11b to isolate the installation space 11a from the outside, thereby reducing the probability of foreign matter from the outside entering the installation space 11a through the joint position between the box cover 12 and the box body 11. At the same time, only the outer side of the sealing layer 13 perpendicular to the direction in which the box cover 12 is set can directly face the outside, which is beneficial to reducing the area where the sealing layer 13 contacts foreign matter from the outside, and is beneficial to extending the service life of the sealing layer 13. The relative positions of the box cover 12 and the box body 11 are fixed by bonding. On the one hand, the process of coating the structural adhesive layer 14 is simple, which is convenient for completing the operation in one go, and is conducive to improving the efficiency of fixing the box cover 12 and the box body 11, and is conducive to using automated equipment for the operation, and is conducive to improving production efficiency; on the other hand, in the subsequent maintenance and overhaul process of the battery 100, after the box cover 12 and the box body 11 are separated, the box cover 12 and the box body 11 can be re-bonded by re-coating the structural adhesive layer 14, which is conducive to realizing the reuse of the box cover 12 and the box body 11, and is conducive to reducing the subsequent use cost.

[0089] It is understandable that the sealing layer 13 itself has elasticity, so that under the extrusion of the box cover 12 and the box body 11, the sealing layer 13 deforms so that the sealing layer 13 and the box cover 12, and the sealing layer 13 and the box body 11 are kept in contact at all positions along the extension direction of the sealing layer 13.

[0090] It is understandable that the sealing layer 13 can be placed on the box cover 12 first, or on the box body 11 first, and then the box cover 12 is placed on the opening 11 b so that the sealing layer 13 is sandwiched between the box cover 12 and the box body 11 .

[0091] The specific location for coating the structural adhesive layer 14 is not limited, and it can be coated on the box cover 12 , on the box body 11 , or on both the box cover 12 and the box body 11 .

[0092] In some embodiments, the cover 12 is arranged in the direction of gravity, that is, the opening 11 b is located on the top side of the cover 12 to facilitate operation during closing of the cover 12 .

[0093] In some embodiments, see Figure 4 , Figure 6 and Figure 7 The sealing layer 13 and the structural adhesive layer 14 are spaced apart from each other perpendicular to the covering direction of the box cover 12 .

[0094] In this way, a gap is left between the sealing layer 13 and the structural adhesive layer 14 to reduce the probability of adhesion between the structural adhesive layer 14 and the sealing layer 13, thereby reducing the probability of the structural adhesive layer 14 pulling the sealing layer 13 and causing damage to the sealing layer 13 during the process of separating the box cover 12 and the box body 11.

[0095] In some embodiments, see Figure 5 The shape of the boundary of the opening 11b is the same as the shape of the sealing layer 13, which is beneficial to reducing the area required to be sealed by the sealing layer 13, making the structure of the battery box 10 more compact.

[0096] It is understandable that when the structural layer comes into contact with foreign matter such as air and water vapor from the outside, its aging rate will be accelerated, its service life will be shortened, and its bonding effect will be ineffective.

[0097] In some embodiments, see Figure 4 , Figure 6 and Figure 7 The structural adhesive layer 14 is arranged on the inner side of the sealing layer 13 perpendicular to the covering direction of the box cover 12.

[0098] In this way, the sealing effect of the sealing layer 13 can reduce the probability of foreign matter from the outside contacting the structural adhesive layer 14, thereby facilitating the extension of the service life of the structural adhesive layer 14 and keeping the box cover 12 and the box body 11 in a fixed state.

[0099] In some embodiments, see Figures 3 to 7 The boundary of the opening 11 b and the sealing layer 13 are spaced apart perpendicular to the covering direction of the box cover 12 , so that a structural adhesive layer 14 is provided on the inner side of the sealing layer 13 perpendicular to the covering direction of the box cover 12 .

[0100] It is understandable that the sealing layer 13 is non-sticky so that the sealing layer 13 will not be pulled and damaged during the process of separating the box cover 12 and the box body 11, which is conducive to the recycling of the sealing layer 13.

[0101] The specific material type of the sealing layer 13 is not limited.

[0102] Exemplarily, the material of the sealing layer 13 is one of butyl rubber, silicone rubber and fluororubber, so that the sealing layer 13 has good elasticity and sealing performance and is non-sticky.

[0103] Butyl rubber, synthesized from isobutylene and isoprene, has good chemical and thermal stability, and has good air tightness and water tightness.

[0104] Silicone rubber refers to a rubber whose main chain is composed of alternating silicon and oxygen atoms, and the silicon atom is usually connected to two organic groups. It has good temperature and oil resistance.

[0105] Fluororubber refers to a synthetic rubber containing fluorine atoms on the carbon atoms of the main chain or side chain. It has good heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance.

[0106] In some embodiments, the initial state of the structural adhesive layer 14 is liquid. After the structural adhesive layer 14 is applied to a preset bonding position of at least one of the box body 11 and the box cover 12, the box cover 12 is covered on the box body 11. After the structural adhesive layer 14 solidifies into a solid, the purpose of bonding the box cover 12 and the box body 11 is achieved.

[0107] The specific material of the structural adhesive layer 14 is not limited.

[0108] Exemplarily, the material of the structural adhesive layer 14 is one of epoxy structural adhesive, acrylic adhesive, polyurethane adhesive, and silicone adhesive, so as to achieve the purpose of bonding and fixing the box cover 12 and the box body 11 by the structural adhesive layer 14.

[0109] Epoxy structural adhesive, that is, an adhesive based on liquid epoxy resin, can be cured at normal room temperature without the need for additional heating or pressure. No volatiles are produced during the curing process, and it is odorless, tasteless and non-toxic after curing.

[0110] Acrylic adhesive is a two-component structural adhesive composed of synthetic acrylate and modified curing agent. It has a fast curing speed and high strength after curing.

[0111] Polyurethane adhesive refers to an adhesive containing carbamate groups or isocyanate groups in the molecular chain, which has good shear strength and impact resistance after curing.

[0112] Silicone adhesive refers to an adhesive composed of a polymer formed by polydimethylsiloxane and silicon dioxide. After curing, it has strong bonding force, high tensile strength and good temperature resistance.

[0113] In some embodiments, see Figure 4 The dimension of the sealing layer 13 perpendicular to its extension direction is a first dimension 13a, and the value range of the first dimension 13a is 8 mm (millimeter) to 12 mm. In this way, the sealing layer 13 can meet the sealing performance requirements while improving the compactness of the overall structure.

[0114] The specific value of the first size 13a is not limited, for example, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, etc.

[0115] The specific measurement method of the first dimension 13a is not limited. For example, at room temperature of 25°C, a vernier caliper is used to clamp the end faces of the sealing layer 13 perpendicular to its extension direction, and the vernier caliper reading is read to obtain the specific dimension value of the first dimension 13a.

[0116] In some embodiments, see Figure 4 The dimension of the structural adhesive layer 14 perpendicular to the extension direction of the sealing layer 13 is a second dimension 14a, and the value range of the second dimension 14a is 8 mm to 12 mm. In this way, the bonding force of the structural adhesive layer 14 can meet the requirements of bonding and fixing the box cover 12 and the box body 11 while improving the compactness of the overall structure.

[0117] The specific value of the second size 14a is not limited, for example, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, etc.

[0118] The specific measurement method of the second dimension 14a is not limited. For example, at room temperature of 25°C, a ruler is used to align the end surfaces of the structural adhesive layer 14 perpendicular to its extension direction, and the ruler is read to obtain the specific dimension value of the second dimension 14a.

[0119] It can be understood that the specific size of the first size 13a and the specific size of the second size 14a can be the same or different.

[0120] The specific arrangement of the structural adhesive layer 14 is not limited.

[0121] In some embodiments, the structural adhesive layer 14 is disposed around the outer side of the opening 11 b perpendicular to the covering direction of the box cover 12 to improve the bonding strength between the box cover 12 and the box body 11 .

[0122] In some other embodiments, see Figure 5 and Figure 6 There are multiple structural adhesive layers 14 , and the multiple structural adhesive layers 14 are arranged at intervals along the extending direction of the sealing layer 13 .

[0123] In this way, while the structural adhesive layer 14 realizes bonding between the box cover 12 and the box body 11 , the amount of structural adhesive required can be reduced, thereby reducing costs.

[0124] It can be understood that the spacing between adjacent structural adhesive layers 14 is equal, so that the force between the box cover 12 and the box body 11 along the extension direction of the boundary of the opening 11 b is uniform.

[0125] It is understandable that after the box cover 12 and the box body 11 are separated, the original structural adhesive layer 14 is broken, and it is necessary to re-apply the structural adhesive to bond the box cover 12 and the box body 11. However, the previous structural adhesive layer 14 is deformed and uneven due to the pulling during the separation process, which is not conducive to the application of new structural adhesive.

[0126] In some embodiments, see Figure 4 The gap size between two adjacent structural adhesive layers 14 along the extension direction of the sealing layer 13 is a third size 14b, the size of the structural adhesive layer 14 along the extension direction of the sealing layer 13 is a fourth size 14c, and the third size 14b is not less than the fourth size 14c.

[0127] That is to say, the gap between two adjacent structural adhesive layers 14 can be used for subsequent re-coating of the structural adhesive, and the size of the gap can allow the amount of structural adhesive coated to meet the requirements of the bonding force between the box cover 12 and the box body 11 .

[0128] In this way, after the battery box 10 is disassembled multiple times, there are still positions on the box cover 12 and the box body 11 that can be used to apply the structural adhesive, which helps to avoid the newly applied structural adhesive being located at the broken position of the previous structural adhesive layer 14, reduces the difficulty of applying the structural adhesive, and helps to ensure that the subsequent bonding force between the box cover 12 and the box body 11 meets the requirements.

[0129] The specific measurement method of the third dimension 14b and the fourth dimension 14c is not limited. For example, at room temperature of 25°C, a ruler is used to align the end faces of the structural adhesive layer 14 at both ends along its extension direction, and to align the two adjacent end faces of two adjacent structural adhesive layers 14 along their extension direction, and the ruler is read to obtain the specific dimension values ​​of the third dimension 14b and the fourth dimension 14c.

[0130] In some embodiments, see Figure 4 , Figure 6 and Figure 7 The box body 11 is provided with a side surface of an opening 11b and a side surface of the box cover 12 facing the opening 11b, one of which is provided with a limiting protrusion 15, and when the box cover 12 is covered on the opening 11b, the limiting protrusion 15 abuts against the other of the two along the covering direction of the box cover 12, and the sealing layer 13 and the structural adhesive layer 14 are respectively located on the opposite sides of the limiting protrusion 15 perpendicular to the covering direction of the box cover 12.

[0131] That is to say, the limiting protrusion 15 protrudes along the covering direction of the box cover 12 , and separates the sealing layer 13 and the structural adhesive layer 14 in a direction perpendicular to the covering direction of the box cover 12 .

[0132] In this way, on the one hand, the size of the gap between the box body 11 and the box cover 12 can be controlled by the limiting protrusion 15, which is beneficial to preventing the sealing layer 13 from being over-compressed when the box cover 12 is covered on the box body 11, thereby reducing the probability of damage caused by excessive compression force on the sealing layer 13; on the other hand, the limiting protrusion 15 can constrain the flow direction of the structural adhesive during the coating process of the structural adhesive, thereby reducing the probability of contact between the structural liquid and the sealing layer 13.

[0133] The limiting protrusion 15 can be arranged on the box body 11 or on the box cover 12 .

[0134] It can be understood that the limiting protrusion 15 is spaced apart from the boundary of the opening 11 b along a direction perpendicular to the covering direction of the box cover 12 so that the sealing layer 13 or the structural adhesive layer 14 is arranged in the gap formed therebetween.

[0135] It can be understood that the limiting protrusion 15 extends along the extension direction of the sealing layer 13 .

[0136] The specific arrangement of the limiting protrusions 15 is not limited.

[0137] In some embodiments, see Figure 4 The number of the limiting protrusion 15 is one, and it is arranged around the outer side of the opening 11b perpendicular to the covering direction of the box cover 12.

[0138] That is, the limiting protrusion 15 is a closed annular structure. Thus, the limiting protrusion 15 can block the flow of the structural adhesive in any direction perpendicular to the cover setting direction of the box cover 12, further effectively reducing the probability of the structural adhesive contacting the sealing layer 13 due to the flow.

[0139] In some embodiments where the limiting protrusion 15 is disposed on the box body 11, see Figure 5 The shape of the boundary of the opening 11b is the same as the shape of the limiting protrusion 15, which is conducive to making the structure of the battery box 10 more compact.

[0140] In some other embodiments, see Figure 6 There are multiple limiting protrusions 15 , and the multiple limiting protrusions 15 are spaced apart along the extending direction of the sealing layer 13 .

[0141] That is to say, a gap is formed between two adjacent limiting protrusions 15 along the extending direction of the sealing layer 13 .

[0142] In this way, during the process of coating the structural adhesive, excess structural adhesive can enter the gap between two adjacent limiting protrusions 15, thereby reducing the probability of excess structural adhesive flowing into the installation space 11a and contacting other components in the battery 100 and causing adverse effects.

[0143] The size relationship between the size of the limiting protrusion 15 along the extension direction of the sealing layer 13 and the second size 14a is not limited, and the two may be equal or unequal.

[0144] It is understandable that the arrangement of the sealing layer 13 , the structural adhesive layer 14 and the limiting protrusion 15 should be conducive to improving the structural compactness of the battery box 10 .

[0145] For example, see Figure 4 , Figure 6 and Figure 7 The sealing layer 13 and the limiting protrusion 15 are fitted perpendicular to the extension direction of the sealant, which is beneficial to reduce the overall size of the sealing layer 13 and the limiting protrusion 15 in the direction perpendicular to the extension direction of the sealant, and further helps to make the structure of the battery box 10 compact and improve the adaptability of the battery box 10.

[0146] For example, see Figure 4 , Figure 6 and Figure 7 The sealing layer 13 and the limiting protrusion 15 are fitted perpendicularly to the extension direction of the sealant, which is beneficial to reducing the overall size of the structural adhesive layer 14 and the limiting protrusion 15 in the direction perpendicular to the extension direction of the sealant, and further helps to make the structure of the battery box 10 compact and improve the adaptability of the battery box 10.

[0147] In some embodiments, see Figure 4 The dimension of the limiting protrusion 15 perpendicular to the extending direction of the sealing layer 13 is a fifth dimension 15a, and the value range of the fifth dimension 15a is 8 mm to 12 mm.

[0148] In this way, there is a sufficient distance between the sealing layer 13 and the structural adhesive layer 14, which reduces the probability of the structural adhesive coming into contact with the sealing layer 13 after overflowing the limiting protrusion 15 before solidification.

[0149] The specific value of the fifth dimension 15a is not limited, for example, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, etc.

[0150] The specific measurement method of the fifth dimension 15a is not limited. For example, at room temperature of 25°C, a vernier caliper is used to clamp the end faces of the limiting protrusion 15 perpendicular to its extension direction, and the vernier caliper reading is read to obtain the specific dimension value of the fifth dimension 15a.

[0151] In some embodiments, see Figure 7 The dimension of the limiting protrusion 15 along the covering direction of the box cover 12 is a sixth dimension 15b, and the value range of the sixth dimension 15b is 0.8mm to 1.2mm.

[0152] In this way, the probability of the structural adhesive overflowing the limiting protrusion 15 before curing is reduced, and at the same time, the gap size between the box cover 12 and the box body 11 is reduced as much as possible when the box cover 12 is closed.

[0153] The specific value of the sixth dimension 15b is not limited, for example, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, etc. The specific measurement method of the sixth dimension 15b is not limited. For example, under a room temperature of 25°C, the depth gauge of the vernier caliper is placed against the plane where the limiting protrusion 15 is located along the covering direction of the box cover 12, and the tail end of the main scale of the vernier caliper is placed against the top surface of the limiting protrusion 15 along the covering direction of the box cover 12, and the reading of the vernier caliper is read to obtain the specific value of the sixth dimension.

[0154] The specific location of the limiting protrusion 15 is not limited.

[0155] In some embodiments, see Figure 7 A first folded edge 111 is provided at the edge of the opening 11b, and a second folded edge 121 is provided at the edge of the box cover 12. The first folded edge 111 and the second folded edge 121 both extend in a direction perpendicular to the covering direction of the box cover 12. A limiting protrusion 15 is provided on the top surface of the supporting folded edge. On the projection surface perpendicular to the covering direction of the box cover 12, the projection of the first folded edge 111 and the projection of the second folded edge 121 at least partially overlap, and the projection of the sealing layer 13, the projection of the limiting protrusion 15 and the projection of the structural adhesive layer 14 are all within the overlapping range.

[0156] In this way, it is convenient to install the sealing layer 13 and apply the structural adhesive, and at the same time, it is convenient to cover the box cover 12 on the box body 11.

[0157] The present application also provides a battery 100, see Figure 2 The battery 100 includes a battery cell 20 and a battery box 10 of any one of the aforementioned embodiments, and the battery cell 20 is disposed in the installation space 11a.

[0158] In this way, the sealing layer 13 in the battery box 10 provides a closed environment for the battery cell 20, reducing the adverse effects of foreign matter entering the installation space 11a on the normal operation of the battery 100, improving the safety of the battery 100, and extending the service life of the battery 100. At the same time, by destroying the structural adhesive layer 14, the battery box 10 can be disassembled to inspect and maintain the battery cell 20, and the box cover 12 and the box body 11 can be fixedly connected again by re-coating the structural adhesive, so that the battery 100 can be reused.

[0159] The embodiment of the present application also provides an electric device, which includes the battery 100 in the above embodiment, and the battery 100 is used as a power source for the electric device. In this way, by improving the sealing performance of the installation space 11a, the service life of the battery 100 as a power source can be effectively improved, so that the battery 100 can supply power to other devices in the electric device more stably and permanently.

[0160] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction.

[0161] The above is only a preferred embodiment of the present application and is not intended to limit the embodiments in the present application. For those skilled in the art, the embodiments of the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A battery box, It is characterized in that The battery box comprises: The box body is provided with an installation space, one side of the installation space is opened to form an opening; A box cover, used to cover the opening; A sealing layer is sandwiched between the box cover and the box body along the covering direction of the box cover, and is arranged around the outer side of the opening perpendicular to the covering direction of the box cover to seal the installation space; The structural adhesive layer is arranged on a side of the sealing layer that is perpendicular to the covering direction of the box cover, and the structural adhesive layer is used to bond the box body and the box cover.

2. The battery box according to claim 1, It is characterized in that The sealing layer and the structural adhesive layer are spaced apart and perpendicular to the covering direction of the box cover.

3. The battery box according to claim 1, It is characterized in that The structural adhesive layer is arranged on the inner side of the sealing layer perpendicular to the covering direction of the box cover.

4. The battery box according to claim 1, It is characterized in that The material of the sealing layer is one of butyl rubber, silicone rubber and fluororubber; And / or, the material of the structural adhesive layer is one of epoxy structural adhesive, acrylic adhesive, polyurethane adhesive, and silicone adhesive.

5. The battery box according to claim 1, It is characterized in that The dimension of the sealing layer perpendicular to its extension direction is a first dimension, and the value range of the first dimension is 8 mm to 12 mm; And / or, a dimension of the structural adhesive layer perpendicular to an extension direction of the sealing layer is a second dimension, and a value range of the second dimension is 8 mm to 12 mm.

6. The battery box according to claim 1, It is characterized in that There are multiple structural adhesive layers, and the multiple structural adhesive layers are arranged at intervals along the extension direction of the sealing layer.

7. The battery box according to claim 6, It is characterized in that The gap size between two adjacent structural adhesive layers along the extension direction of the sealing layer is a third size, the size of the structural adhesive layer along the extension direction of the sealing layer is a fourth size, and the third size is not less than the fourth size.

8. The battery box according to claim 1, It is characterized in that The box body is provided with a side surface of the opening and a side surface of the box cover facing the opening, one of which is provided with a limiting protrusion, and when the box cover is closed on the opening, the limiting protrusion abuts against the other of the two along the covering direction of the box cover, and the sealing layer and the structural adhesive layer are respectively located on opposite sides of the limiting protrusion perpendicular to the covering direction of the box cover.

9. The battery box according to claim 8, It is characterized in that The number of the limiting protrusion is one, and it is arranged around the outer side of the opening perpendicular to the covering direction of the box cover; Alternatively, there are multiple limiting protrusions, and the multiple limiting protrusions are arranged at intervals along the extension direction of the sealing layer.

10. The battery box according to claim 8, It is characterized in that The sealing layer and the limiting protrusion are in contact with each other perpendicular to the extending direction of the sealing layer; And / or, the sealing layer and the limiting protrusion are in contact with each other perpendicular to the extending direction of the sealing layer.

11. The battery box according to claim 8, It is characterized in that The dimension of the limiting protrusion perpendicular to the extending direction of the sealing layer is a fifth dimension, and the value range of the fifth dimension is 8 mm to 12 mm; And / or, a dimension of the limiting protrusion along the covering direction of the box cover is a sixth dimension, and a value range of the sixth dimension is 0.8 mm to 1.2 mm.

12. A battery, It is characterized in that The battery includes a battery cell and the battery box according to any one of claims 1 to 11, and the battery cell is disposed in the installation space.

13. An electrical device, It is characterized in that The electric device comprises the battery according to claim 12, and the battery is used as a power source for the electric device.

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