Battery cell, battery device, and electric device

Abstract

A battery cell (20), a battery device (100), and an electric device (1000). The battery cell (20) comprises: a casing component (21) provided with a mounting hole (201a); an electrode component (22) accommodated in the casing component (21); an electrode column component (23) mounted at the mounting hole (201a) and connected to the electrode component (22); and a sealing structure (24) fitting to the electrode column component (23) to seal the casing component (21) at the mounting hole (201a), wherein the sealing structure (24) is in insertion fit with the electrode column component (23), and / or the sealing structure (24) is in insertion fit with the casing component (21).

Description

Battery cell, battery device and electric device TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery cell, a battery device and an electric device. BACKGROUND

[0002] In recent years, new energy vehicles have made a great leap in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable important role. The battery is composed of a box body and a plurality of battery cells contained in the box body. In the structure of the battery cell, the pole column needs to be sealed when it is installed with the shell. However, the sealing reliability of the pole column and the shell will affect the reliability of the battery cell. How to further improve the sealing between the pole column and the shell has become one of the problems to be solved at present.

[0003] SUMMARY

[0004] The embodiments of the present application provide a battery cell, a battery device and an electric device, which can effectively improve the reliability of the battery cell, the battery device and the electric device.

[0005] In the first aspect, the embodiments of the present application provide a battery cell, comprising: a shell member provided with a mounting hole; an electrode member accommodated in the shell member; a pole column member installed at the mounting hole and connected with the electrode member; a sealing structure cooperating with the pole column member to realize the sealing of the shell member at the mounting hole; wherein the sealing structure and the pole column member are plug-in cooperated; and / or the sealing structure and the shell member are plug-in cooperated.

[0006] In the above technical solution, since the sealing structure and the pole column member can be plug-in cooperated, and / or the sealing structure and the shell member can be plug-in cooperated, the position of the sealing structure can be fixed well, the positioning of the sealing structure can be realized, and thus the probability of displacement of the sealing structure can be reduced in the assembly process of the pole column member and the mounting hole of the shell member, and the risk of sealing failure caused by displacement of the sealing structure can be reduced. The above structure can also bind the sealing structure to some extent, and the risk of deformation of the sealing structure can be reduced, and thus the risk of sealing failure caused by deformation of the sealing structure can be reduced. That is, the battery cell with the above structure can improve the reliability of the sealing structure, and thus is conducive to improving the sealing reliability of the pole column member and the reliability of the battery cell.

[0007] In some embodiments of the present application, the pole column member comprises a pole column body and an adapter, the pole column body is installed at the mounting hole through the adapter and connected with the electrode member, the adapter and the sealing structure are plug-in cooperated, and the adapter and the sealing structure surround the pole column body.

[0008] In the technical solution, the adapter of the pole column component can be used to connect the shell component, which is conducive to improving the problem of deformation of the shell component under stress during the process of mounting the pole column component to the shell component, reducing the probability of deformation or damage of the shell wall, and thus improving the reliability of the battery monomer. In addition, the sealing structure and the adapter are inserted and connected, which can simplify the structural complexity of the pole column body, reduce the manufacturing difficulty and cost of the pole column component under the premise of meeting the insertion and connection of the sealing structure and the pole column component. The adapter can also provide rigid support for the sealing structure, reduce the probability of deformation of the sealing component during the cooperation process with the pole column body, and improve the sealing reliability of the pole column component and the reliability of the battery monomer.

[0009] In some embodiments of the present application, one of the sealing structure and the adapter is provided with a groove, and the other is provided with a protrusion. In the technical solution, the sealing structure and the adapter are easily inserted and connected through the groove and the protrusion. The structure is simple to manufacture, which can reduce the manufacturing difficulty and thus reduce the cost.

[0010] In some embodiments of the present application, the sealing structure includes a first sealing part and a second sealing part connected to each other. The first sealing part is arranged on the inner side of the adapter close to the pole column body, and the second sealing part is arranged on the outer side of the adapter away from the electrode component and extends to the side away from the pole column body.

[0011] In the technical solution, by arranging the sealing structure in the above structure, the sealing contact surface of the sealing structure and the pole column component can be increased, and different parts of the pole column body can be specially sealed, which can protect the pole column body in multiple directions. When one of the first sealing part and the second sealing part fails and causes sealing failure, the other can still play a certain sealing role, which is conducive to reducing the probability of leakage and improving the sealing reliability of the sealing structure to the pole column body, and thus improving the reliability of the battery monomer. On the other hand, the sealing structure arranged in the above structure is also conducive to adapting to the pole column body with complex structure, which can better adapt to the shape of the pole column body and reduce the probability of sealing failure.

[0012] In some embodiments of the present application, the first sealing part is provided with a groove or a protrusion.

[0013] In the technical scheme, the pole body is usually assembled into the mounting hole along a direction perpendicular to the shell wall, the recess or the protrusion of the first sealing part is arranged in plug connection with the pole body, the structure of the second sealing part can be simplified, the influence of the recess or the protrusion on the second sealing part can be reduced during compression of the second sealing part on the shell wall by the pole body, the second sealing part is facilitated to have a larger compression amount, and thus the sealing property of the second sealing part is enhanced, and a better sealing effect can be achieved. The technical scheme can also reduce the protruding height of the sealing structure relative to the shell wall under the premise that the second sealing part has a suitable compression amount, and thus the size of the battery monomer is reduced, and the volume energy density of the battery monomer is improved.

[0014] In some embodiments of the present application, the first sealing part is provided with a recess, and the adapter is provided with a protrusion.

[0015] In the technical scheme, the first sealing part is arranged on the inner side of the adapter close to the pole body, the inner side space of the pole body is limited, the adapter is provided with the protrusion, that is, the inner side of the adapter is provided with the protrusion, and the manufacturing of the protrusion is facilitated. The first sealing part is provided with the recess, that is, the outer side of the first sealing part is provided with the recess, and the manufacturing of the recess is facilitated due to the larger space of the outer side of the first sealing part. It can be understood that the manufacturing difficulty of the recess and the protrusion is reduced by using the above structure, and the recess and the protrusion are also easy to assemble, and the cost is reduced.

[0016] In some embodiments of the present application, the protrusion comprises a first part and a second part, the first part is connected to the adapter, and the second part is arranged on one side of the first part close to the pole body. In the circumferential direction of the adapter, the size of the second part is greater than the size of the first part.

[0017] In the technical scheme, by arranging the protrusion in the above structure, the protrusion can form a hook-shaped structure, and the protrusion is not easy to be separated after being matched with the recess. The probability of disconnection between the adapter and the first sealing part is reduced, the connection reliability of the adapter and the first sealing part is improved, and thus the sealing reliability of the whole sealing structure to the pole body is improved, and the reliability of the battery monomer is improved.

[0018] In some embodiments of the present application, in the circumferential direction of the adapter, the two ends of the second part are arranged protruding relative to the two ends of the first part. In the technical scheme, the opposite ends of the protrusion can form a hook-shaped structure, and thus the connection reliability of the protrusion and the recess is further improved, the sealing reliability of the sealing structure to the pole body is further improved, and the reliability of the battery monomer is improved.

[0019] In some embodiments of the present application, the thickness of the protrusion is less than the thickness of the adapter in the height direction of the pole body. In this technical solution, the first sealing part and the pole body can always have a certain sealing contact surface in the height direction of the pole body, which is beneficial to reduce the risk of leakage between the protrusion and the groove, improve the sealing reliability of the first sealing part to the pole body, and further improve the overall sealing reliability of the sealing structure to the pole body, thereby improving the reliability of the battery monomer. The above scheme is also beneficial to reduce the size and weight of the protrusion, reduce the weight of the pole part and the sealing structure, and further reduce the weight of the battery monomer, which is beneficial to improve the volume energy density of the battery monomer.

[0020] In some embodiments of the present application, the second sealing part is provided with a groove or a protrusion.

[0021] In the above technical solution, since the second sealing part is provided with a groove or a protrusion, the position where the adapter cooperates with the second sealing part is the outer side, and there is more space for setting the protrusion or the groove, which is beneficial to reduce the processing difficulty of the adapter and reduce the cost. Moreover, whether the second sealing part is provided with a groove or a protrusion, the groove and the protrusion are located on the side away from the shell part of the adapter. Since burrs are easy to occur in the manufacturing process of the groove, the above scheme can reduce the risk of burrs falling into the inside of the shell part, reduce the probability of burrs piercing the insulating material inside the shell part, causing the insulation performance between the positive and negative electrodes to decrease, and also reduce the probability of burrs and electrolyte reacting chemically to affect the chemical performance of the battery monomer, and reduce the probability of burrs piercing the isolation film and damaging the electrode part, which is beneficial to improve the reliability of the battery monomer.

[0022] In some embodiments of the present application, the second sealing part is provided with a protrusion, and the adapter is provided with a groove.

[0023] In the above technical solution, since the second sealing part plays a sealing role through compression deformation, the second sealing part is provided with a protrusion, which will thin the thickness of the second sealing part compared to the groove provided on the second sealing part, and thus weaken the sealing performance of the second sealing part. The above scheme can make the second sealing part have a larger compression amount during the compression of the second sealing part on the shell wall by the pole body, and thus can make the second sealing part have better sealing performance between the pole body and the shell wall, which is beneficial to improve the sealing performance of the battery monomer and further improve the reliability of the battery monomer.

[0024] In some embodiments of the present application, the groove comprises a first groove part and a second groove part connected in communication, the second groove part is located on the side away from the second sealing part of the first groove part, and the width of the second groove part is less than the width of the first groove part.

[0025] In the technical scheme, the groove is arranged in the above structure, the groove can form a stepped groove, and is not easy to be separated after being matched with the protrusion, the probability of loosening between the adapter and the second sealing part can be reduced, the connection reliability of the adapter and the second sealing part is improved, and the sealing reliability of the whole sealing structure to the pole body is further improved, so that the reliability of the battery monomer is improved.

[0026] In some embodiments of the present application, the groove and the protrusion are symmetrically arranged on at least two opposite sides of the adapter. In the above scheme, at least two opposite sides of the adapter and the sealing structure can be inserted and matched, the adapter and the sealing structure can be better limited and fixed, the combination reliability of the adapter and the sealing structure is improved, the risk of sealing failure between the adapter and the sealing structure due to unreliable connection is reduced, and the sealing reliability of the sealing structure to the pole part is further improved, so that the reliability of the battery monomer is improved.

[0027] In some embodiments of the present application, the groove and the protrusion are multiple and are arranged at intervals along the circumference of the adapter. In the technical scheme, by increasing the number of grooves and protrusions, more insertion and matching structures can be provided in the circumference of the adapter and the sealing structure, so that the connection reliability of the adapter and the sealing structure can be improved, the sealing structure can be better bound by the adapter, the probability of deformation or displacement of the sealing structure is further reduced, the sealing reliability of the sealing structure is further improved, and the reliability of the battery monomer is improved.

[0028] In some embodiments of the present application, the sealing structure is injection molded on the adapter.

[0029] In the above technical scheme, the sealing structure is injection molded on the adapter, so that a seamless connection is formed between the sealing structure and the adapter, the leakage of internal substances of the battery monomer and the entry of external impurities can be effectively prevented, and the sealing reliability is improved. The above structure can also make the distribution of the sealing structure on the adapter more uniform, and can withstand pressure from all directions. The uniform stress is conducive to improving the stability of the sealing, reducing the problem of sealing failure caused by uneven local stress. On the other hand, the above scheme can make the fixing of the sealing structure and the adapter more firm, and can reduce the installation steps, simplify the assembly steps, improve the production efficiency, and be conducive to accurately controlling the size and shape of the sealing structure, so that the sealing structure and the adapter can be perfectly matched, the installation problem caused by size deviation is reduced, and the production efficiency and product quality are improved.

[0030] In some embodiments of the present application, the shell component comprises a first wall provided with the mounting hole, the pole column component comprises a connecting component and a first insulating piece, the pole column body is connected with the electrode component, the connecting component is connected with the first wall, and the connecting component is connected with the pole column body in an insulating fit; wherein the connecting component comprises a vertical arm extending away from the first wall, and a projection of the vertical arm on the first wall at least partially overlaps with a projection of the pole column body on the first wall along a thickness direction of the first wall.

[0031] In a second aspect, the embodiments of the present application provide a battery device, comprising the battery monomer of any one of the preceding.

[0032] In the above technical solution, the sealing structure of the battery monomer has high sealing reliability, thereby improving the reliability of the battery monomer, and thus the reliability of the battery device is improved.

[0033] In a third aspect, the embodiments of the present application provide a power consumption device, comprising the battery monomer of any one of the preceding, or the battery device of the preceding.

[0034] In the above technical solution, the sealing structure of the battery monomer has high sealing reliability, thereby the battery monomer has high reliability, and the battery device using the battery monomer also has high reliability, thereby the reliability of the power consumption device comprising the battery monomer or the battery device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0036] FIG. 1 is a structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0037] FIG. 2 is an exploded structural diagram of a battery device provided by some embodiments of the present application;

[0038] FIG. 3 is a schematic diagram of the internal structure of a battery monomer provided by some embodiments of the present application;

[0039] FIG. 4 is a partial enlarged schematic diagram of IV of FIG. 3;

[0040] FIG. 5 is a schematic diagram of the plug-in fit of a sealing structure and a shell component provided by some embodiments of the present application;

[0041] FIG. 6 is a schematic diagram of the plug-in fit of a sealing structure and a shell component, and a pole column component provided by some embodiments of the present application;

[0042] Fig. 7 is a perspective view of a sealing structure plugged into an adapter according to some embodiments of the present application;

[0043] Fig. 8 is a view of a sealing structure and an adapter plugged together according to some embodiments of the present application;

[0044] Fig. 9 is an exploded view of a sealing structure and an adapter according to some embodiments of the present application;

[0045] Fig. 10 is a perspective view of an adapter according to some embodiments of the present application;

[0046] Fig. 11 is a view of a sealing structure and an adapter plugged together according to other embodiments of the present application;

[0047] Fig. 12 is a top view of an adapter according to other embodiments of the present application;

[0048] Fig. 13 is a cross-sectional view of an adapter according to other embodiments of the present application;

[0049] Fig. 14 is a view of a sealing structure and an adapter plugged together according to yet other embodiments of the present application;

[0050] Fig. 15 is a cross-sectional view of an adapter according to yet other embodiments of the present application;

[0051] Fig. 16 is an exploded view of a battery cell according to some embodiments of the present application;

[0052] Fig. 17 is an assembly view of a pole member and a sealing structure according to some embodiments of the present application;

[0053] Fig. 18 is an assembly view of a pole member and a sealing structure according to some embodiments of the present application, with a first insulating member omitted;

[0054] Fig. 17 is an assembly view of a pole member and a sealing structure according to some embodiments of the present application;

[0055] 1000, an electrical device;

[0056] 100, a battery device;

[0057] 10, a case; 11, a first case body; 12, a second case body;

[0058] 20, a battery cell;

[0059] 21, a housing member; 201, a first wall; 201a, a mounting hole;

[0060] 22, an electrode member;

[0061] 23, a pole member;

[0062] 231, pole body; 233, adapter; 232, connecting member; 2321, vertical arm; 234, first insulating member; 2301, recess; 2302, protrusion;

[0063] 24, sealing structure;

[0064] 241, first sealing portion; 242, second sealing portion;

[0065] 251, groove;

[0066] 2511, first slot portion; 2512, second slot portion;

[0067] 252, protrusion;

[0068] 2521, first portion; 2522, second portion;

[0069] 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0070] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0071] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0072] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to the other embodiments.

[0073] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mount", "connected", "connection", "attach" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0075] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0076] "Multiple" appearing in the present application means two or more (including two).

[0077] In the present application, the battery cell can include 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. The present application embodiments are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The present application embodiments are also not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, and the present application embodiments are also not limited thereto.

[0078] The battery apparatus mentioned in the embodiments of the present application can refer to one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component. In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0079] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie.

[0080] In some embodiments, the battery device can be a battery pack, which includes a box and one or more battery cell assemblies accommodated in the box. As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box. As an example, the battery cell assembly can also be accommodated in the box by fixing a plurality of battery cells directly in the box. The box can prevent liquid or other foreign matters from affecting the charging or discharging of the battery cells.

[0081] The battery cell includes a housing, an electrode component, and an electrolyte, where the housing is used to accommodate the electrode component and the electrolyte. The electrode component is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer, where the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer, where the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that no fuse occurs when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0082] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode component can be a roll structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0083] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable important role. The battery is composed of a box body and a plurality of battery monomers contained in the box body. Among them, as the core components of new energy vehicles, batteries have high requirements in terms of safety and service life. In the structure of the battery monomer, the pole column needs to be sealed when it is installed with the shell. However, the sealing reliability of the pole column and the shell will affect the reliability of the battery monomer. How to further improve the sealing between the pole column and the shell has become one of the problems to be solved.

[0084] In a general battery monomer, the pole column is installed in the mounting hole of the shell, and the pole column and the mounting hole need to be sealed by a sealing ring. During installation, the pole column compresses the sealing ring against the shell to achieve sealing. However, during the compression of the sealing ring, if the placement position of the sealing ring is offset, or the sealing ring is deformed before placement and does not recover, it will cause the sealing ring to not seal in place, thereby causing sealing failure. Especially for larger size pole columns, the required sealing ring size is also relatively large, and the sealing ring is more likely to be offset or misaligned during placement, and is more likely to deform, thereby further increasing the risk of sealing failure.

[0085] Based on the above considerations, in order to solve the problem that the sealing ring for sealing the pole column and the shell is prone to displacement or deformation, which can easily cause sealing failure and affect the reliability of the battery monomer, the applicant designs a battery monomer, which includes: a shell component, an electrode component, a pole column component, and a sealing structure, the shell component is provided with a mounting hole; the electrode component is accommodated in the shell component; the pole column component is installed at the mounting hole and connected with the electrode component; the sealing structure cooperates with the pole column component to achieve the sealing of the shell component at the mounting hole; wherein the sealing structure and the pole column component are inserted and cooperated; and / or the sealing structure and the shell component are inserted and cooperated.

[0086] In the battery monomer of this structure, since the sealing structure and the pole column component can be inserted and cooperated, and / or the sealing structure can be inserted and cooperated with the shell component, the position of the sealing structure can be fixed well, and the positioning of the sealing structure can be achieved, thereby reducing the probability of displacement of the sealing structure during the assembly of the pole column component and the mounting hole of the shell component, and reducing the risk of sealing failure caused by displacement of the sealing structure. The above structure can also constrain the sealing structure to some extent, thereby reducing the risk of deformation of the sealing structure, and thus reducing the risk of sealing failure caused by deformation of the sealing structure. That is, the battery monomer with the above structure can improve the reliability of the sealing structure, and thus improve the sealing reliability of the pole column component, thereby improving the reliability of the battery monomer.

[0087] The battery device disclosed in the embodiments of the present application can be used in, but is not limited to, an electric device such as a vehicle, a ship or an aircraft. The power supply system of the electric device can be composed of the battery cell, the battery device and the like disclosed in the present application.

[0088] The embodiments of the present application provide an electric device using the battery device as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric aircraft toy. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft.

[0089] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0090] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile. The vehicle is internally provided with a battery device 100. The battery device 100 can be arranged at the bottom, the head or the tail of the vehicle. The battery device 100 can be used for power supply of the vehicle, for example, the battery device 100 can be used as an operating power supply of the vehicle. The vehicle can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle during starting, navigation and driving.

[0091] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle, but also be used as a driving power supply of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0092] Please refer to FIG. 2, which is an exploded view of the battery device 100 according to some embodiments of the present application. The battery device 100 includes a box 10 and a plurality of battery cells 20, which are accommodated in the box 10. The box 10 is used to provide an assembly space for the battery cells 20, and can have various structures. In some embodiments, the box 10 can include a first box body 11 and a second box body 12, which are overlapped with each other. The first box body 11 and the second box body 12 together define an assembly space for accommodating the battery cells 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate structure, which is overlapped with the open end of the second box body 12 to define the assembly space together with the second box body 12. Alternatively, the first box body 11 and the second box body 12 can both be hollow structures with one side open, and the open side of the first box body 11 is overlapped with the open side of the second box body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can have various shapes, such as a cylinder or a cuboid.

[0093] In the battery device 100, the plurality of battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that some of the plurality of battery cells 20 are connected in series, and some of the plurality of battery cells 20 are connected in parallel. The plurality of battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the whole is accommodated in the box 10. Of course, the battery device 100 can also be that the plurality of battery cells 20 are first connected in series, in parallel, or in a mixed manner to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box 10. The battery device 100 can further include other structures, for example, the battery device 100 can further include a current collecting component for realizing electrical connection between the plurality of battery cells 20.

[0094] Please refer to FIG. 3, which is a partial structure diagram of the battery device 100 according to some embodiments of the present application. The battery device 100 includes a plurality of rows of battery cells 20, which are arranged along the length direction of the box 10. Each row of battery cells 20 includes a plurality of battery cells 20 arranged along the width direction of the box 10. Alternatively, the plurality of rows of battery cells 20 are arranged along the width direction of the box 10, and each row of battery cells 20 includes a plurality of battery cells 20 arranged along the length direction of the box 10.

[0095] Each battery cell 20 can be a secondary battery or a primary battery, where a secondary battery refers to a battery cell 20 that can be activated by charging after discharging, and 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-acid battery, etc. The embodiments of the present application are not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. For example, in FIG. 3, the shape of the battery cell 20 is a cuboid.

[0096] According to some embodiments of the present application, with reference to FIGS. 3 and 4, the embodiments of the present application provide a battery cell 20, comprising: a housing component 21, an electrode component 22, a pole component 23, and a sealing structure 24.

[0097] The housing component 21 is provided with a mounting hole 201a. The electrode component 22 is accommodated in the housing component 21. The pole component 23 is mounted at the mounting hole 201a and connected with the electrode component 22. The sealing structure 24 cooperates with the pole component 23 to realize the sealing of the housing component 21 at the mounting hole 201a; wherein the sealing structure 24 and the pole component 23 are inserted and fitted; and / or the sealing structure 24 is inserted and fitted with the housing component 21.

[0098] The housing component 21 can refer to a shell structure for wrapping and protecting the internal chemical materials and components of the battery. The shape of the housing component 21 can be, but is not limited to, a cuboid, a square, a cylinder, etc. For example, with reference to FIGS. 3 and 16, the shape of the housing component 21 is a cuboid. The mounting hole 201a can refer to a hole provided on the housing component 21, including but not limited to being provided on the first direction X, the second direction Y, or the third direction Z of the housing component 21, and being used for mounting the pole component 23.

[0099] The electrode component 22 can refer to being composed of a positive electrode sheet, a negative electrode sheet, and a separator film, which can be specifically referred to the foregoing description.

[0100] The pole component 23 can refer to a component mainly made of a metal material with good electrical conductivity, which is a key component for connecting the internal and external circuits of the battery cell 20, responsible for leading the current generated inside the battery cell 20 to the external circuit, or leading the current of the external power supply into the battery cell 20 during charging. For example, the number of the pole component 23 can be one or more, when the pole component 23 is one, the pole component 23 is a negative pole; when the pole component 23 is multiple, part of the multiple pole components 23 can be positive poles, and the rest can be negative poles, or all of the multiple pole components 23 can be negative poles.

[0101] The sealing structure 24 can be a structure or component that plays a sealing role between the pole piece 23 and the mounting hole 201a. The sealing structure 24 can be a component arranged in a circumferential ring around the pole piece 23. For example, the sealing structure 24 is a sealing ring. In the present application, the material of the sealing structure 24 can include but is not limited to rubber, plastic and other elastic materials, wherein the rubber material can include but is not limited to fluororubber, silicone rubber, nitrile rubber and the like, and the plastic material can include but is not limited to polytetrafluoroethylene, polyethylene and the like.

[0102] In the above example scheme of the present application, the sealing structure 24 can be inserted and fitted with the pole piece 23 (see FIG. 4), or the sealing structure 24 can be inserted and fitted with the housing component 21 (see FIG. 5), or the sealing structure 24 can be inserted and fitted with both the pole piece 23 and the housing component 21 (see FIG. 6).

[0103] In the above technical scheme, since the sealing structure 24 can be inserted and fitted with the pole piece 23, and / or the sealing structure 24 can be inserted and fitted with the housing component 21, the sealing structure 24 can be well fixed in position, and the positioning of the sealing structure 24 can be achieved, so that the probability of displacement of the sealing structure 24 can be reduced during the assembly of the pole piece 23 and the mounting hole 201a of the housing component 21, and the risk of sealing failure caused by displacement of the sealing structure 24 can be reduced. The above structure can also constrain the sealing structure 24 to a certain extent, and the risk of deformation of the sealing structure 24 can be reduced, so that the risk of sealing failure caused by deformation of the sealing structure 24 can be reduced. That is, the battery monomer 20 with the above structure can improve the reliability of the sealing structure 24, and thus the sealing reliability of the pole piece 23 and the reliability of the battery monomer 20 can be improved.

[0104] In some embodiments of the present application, referring to FIGS. 4, 7, 8, 9, 11, 14 and 16, the pole piece 23 includes a pole body 231 and an adapter 233, the pole body 231 is installed in the mounting hole 201a through the adapter 233 and connected with the electrode component 22, the adapter 233 is inserted and fitted with the sealing structure 24, and the adapter 233 and the sealing structure 24 surround the pole body 231.

[0105] The pole body 231 can be a component made of a metal material with good electrical conductivity. The material of the pole body 231 can be but is not limited to aluminum, copper, silver or gold and the like.

[0106] The adapter 233 can be a component of the pole component 23 installed in the mounting hole 201a and connected to the shell component 21. The adapter 233 can be, but is not limited to, a plate-shaped component, a block-shaped component, or the like. For example, referring to FIGS. 9-15, the adapter 233 can be an adapter plate. The adapter 233 can also be, but is not limited to, a metal component, a composite component, or the like. The metal component can include, but is not limited to, aluminum, copper, steel, or the like. The connection between the adapter 233 and the shell component 21 can be, but is not limited to, welding, riveting, or clamping, or the like.

[0107] The "adapter 233 and the sealing structure 24 surround the pole body 231" can be understood as the adapter 233 and the sealing structure 24 being annular components. For example, the adapter 233 is an adapter plate with a central opening, and the sealing structure 24 is a sealing ring.

[0108] In a conventional pole component structure, the pole body needs to press on the sealing component placed on the shell component to achieve the sealing of the shell component. However, in order to ensure the required pre-tightening force for sealing, the pressure applied by the pole component to the shell component is relatively large, which can easily cause deformation or damage to the shell wall when the thickness of the shell component is relatively small. In the present application, by arranging the pole component 23 as described above, when the pole component 23 is installed in the mounting hole 201a, the pre-tightening force required for the compression amount of the sealing structure 24 can act on the adapter 233, thereby reducing the stress on the shell component 21. Thus, the problem of deformation of the shell component 21 under stress can be improved, and the probability of deformation or damage of the shell wall can be reduced. Thus, the reliability of the shell component 21 can be improved, and the reliability of the battery monomer 20 can be improved.

[0109] Since the adapter 233 surrounds the pole body 231, the size of the adapter 233 is larger than that of the pole body 231. By inserting and fitting the adapter 233 and the sealing structure 24, the adapter 233 can provide a larger installation space, facilitating the installation and fixation of the sealing structure 24, and improving the assembly accuracy and efficiency. Moreover, the above-mentioned solution allows the sealing structure 24 to be not connected to the pole body 231, which is beneficial to simplify the structural complexity of the pole body 231. The pole body 231 is an important component of the pole component 23, and thus the above-mentioned solution can simplify the manufacturing process of the pole body 231, improve the manufacturing difficulty of the pole body 231, and improve the product yield, thereby reducing the cost.

[0110] The adapter 233 is generally a rigid member made of metal or the like. The sealing structure 24 is assembled with the adapter 233, which is assembled on the pole body 231. On the one hand, the position accuracy during the assembly of the sealing structure 24 and the pole body 231 is improved, the probability of sealing failure caused by displacement of the sealing structure 24 is reduced, and the sealing reliability is improved. On the other hand, the adapter 233 provides rigid support for the sealing structure 24, improves the deformation of the sealing structure 24, reduces the probability of sealing failure caused by deformation of the sealing structure 24, and further improves the sealing reliability. That is, the sealing structure 24 and the adapter 233 are inserted and matched, which is beneficial to improve the sealing reliability of the pole component 23.

[0111] In the above technical solution, the adapter 233 of the pole component 23 can be used to connect the shell component 21, which is beneficial to improve the problem of deformation of the shell component 21 under stress during the installation of the pole component 23 to the shell component 21, reduce the probability of deformation or damage of the shell wall, and further improve the reliability of the battery monomer 20. In addition, the wall thickness of the shell component 21 can be reduced under the premise that the shell wall does not deform or damage, the weight of the battery monomer 20 is reduced, and the energy density of the battery monomer 20 is improved. Moreover, the sealing structure 24 and the adapter 233 are inserted and matched, which can simplify the structure complexity of the pole body 231 under the premise of meeting the insertion and matching of the sealing structure 24 and the pole component 23. The manufacturing difficulty and cost of the pole component 23 are reduced. The adapter 233 can also provide rigid support for the sealing structure 24, reduce the probability of deformation of the sealing structure 24 during the assembly with the pole body 231, and improve the sealing reliability of the pole component 23 and the reliability of the battery monomer 20.

[0112] In some embodiments of the present application, referring to FIGS. 4, 7-15, one of the sealing structure 24 and the adapter 233 is provided with a groove 251, and the other is provided with a protrusion 252. The protrusion 252 is arranged in the groove 251.

[0113] The groove 251 can refer to a recessed area with a certain shape and size. The protrusion 252 can refer to a protruding structure with a certain shape. In the embodiments of the present application, the shape and size of the groove 251 and the protrusion 252 are matched with each other. The shape of the groove 251 and the protrusion 252 can be, but is not limited to, a cuboid, a cylinder, or a stepped shape, etc. For example, referring to FIGS. 9 and 10, the shape of the groove 251 and the protrusion 252 is a cuboid. Referring to FIGS. 11-15, the shape of the groove 251 and the protrusion 252 is a cylinder.

[0114] In the above example scheme, referring to FIGS. 4, 7-10, the sealing structure 24 is provided with the groove 251, and the adapter 233 is provided with the protrusion 252. Alternatively, referring to FIGS. 11-15, the sealing structure 24 is provided with the protrusion 252, and the adapter 233 is provided with the groove 251.

[0115] In the above technical scheme, the sealing structure 24 and the adapter 233 are easily inserted and matched through the groove 251 and the protrusion 252, the structure is relatively simple to use, which can reduce the manufacturing difficulty and in turn reduce the cost.

[0116] In some embodiments of the present application, referring to FIGS. 8, 9, 11 and 14, the sealing structure 24 includes the first sealing part 241 and the second sealing part 242 connected with each other, the first sealing part 241 is arranged at the inner side of the adapter 233 close to the pole body 231, and the second sealing part 242 is arranged at the outer side of the adapter 233 away from the electrode part 22 and extends to the side away from the pole body 231.

[0117] The first sealing part 241 can refer to the inner ring part of the sealing structure 24, and the second sealing part 242 can refer to the outer ring part of the sealing structure 24. The materials of the first sealing part 241 and the second sealing part 242 can be the same or different.

[0118] Referring to FIG. 4, the first sealing part 241 can seal the end part of the pole body 231 in the first direction X, and the second sealing part 242 can seal the end part of the pole body 231 in the third direction Z. By arranging the sealing structure 24 in the above structure, the sealing contact surface of the sealing structure 24 and the pole body 231 can be increased, and the sealing reliability can be improved.

[0119] In the above technical scheme, by arranging the sealing structure 24 in the above structure, the sealing contact surface of the sealing structure 24 and the pole part 23 can be increased, and different parts of the pole body 231 can be specially sealed, which can protect the pole body 231 in multiple directions. When one of the first sealing part 241 and the second sealing part 242 fails to seal, the other one can still play a certain sealing role, which is conducive to reducing the probability of leakage, improving the sealing reliability of the sealing structure 24 to the pole body 231, and in turn improving the reliability of the battery monomer 20. On the other hand, the sealing structure 24 arranged in the above structure is also conducive to adapting to the pole body 231 with a relatively complex structure, which can better adapt to the shape of the pole body 231 and reduce the probability of sealing failure.

[0120] In some embodiments of the present application, referring to FIGS. 4, 8-10, the first sealing part 241 is provided with the groove 251 or the protrusion 252.

[0121] The first sealing part 241 can be provided with a groove 251 (see FIGS. 4, 8-10), and the adapter 233 is provided with a protrusion 252; or the first sealing part 241 is provided with the protrusion 252, and the adapter 233 is provided with the groove 251.

[0122] In the technical solution, since the pole body 231 is usually assembled into the mounting hole 201a in a direction perpendicular to the shell wall, the first sealing part 241 is provided with the groove 251 or the protrusion 252 to be inserted into the pole body 231, which can simplify the structure of the second sealing part 242, reduce the influence of the groove 251 or the protrusion 252 on the second sealing part 242 during compression of the second sealing part 242 on the shell wall by the pole body 231, and facilitate the second sealing part 242 to have a larger compression amount, thereby enhancing the sealing performance of the second sealing part 242 and achieving better sealing effect. The above solution can also reduce the protruding height of the sealing structure 24 relative to the shell wall under the premise that the second sealing part 242 has an appropriate compression amount, thereby facilitating the reduction of the size of the battery monomer 20 and the improvement of the volume energy density of the battery monomer 20.

[0123] In some embodiments of the present application, referring to FIGS. 4, 8-10, the first sealing part 241 is provided with the groove 251, and the adapter 233 is provided with the protrusion 252.

[0124] In the technical solution, since the first sealing part 241 is arranged on the inner side of the adapter 233 close to the pole body 231, the inner space of the pole body 231 is limited, and the adapter 233 is provided with the protrusion 252, that is, the inner side of the adapter 233 is provided with the protrusion 252, which facilitates the processing and manufacturing of the protrusion 252. The first sealing part 241 is provided with the groove 251, that is, the outer side of the first sealing part 241 is provided with the groove 251, and since the outer side of the first sealing part 241 has a larger space, the processing and manufacturing of the groove 251 are facilitated. It can be understood that the above structure can reduce the processing difficulty of the groove 251 and the protrusion 252, and the groove 251 and the protrusion 252 are also easy to assemble, thereby reducing the cost.

[0125] In some embodiments of the present application, referring to FIGS. 9 and 10, the protrusion 252 includes a first part 2521 and a second part 2522, the first part 2521 is connected to the adapter 233, and the second part 2522 is arranged on one side of the first part 2521 close to the pole body 231. In the circumferential direction of the adapter 233, the size of the second part 2522 is greater than the size of the first part 2521.

[0126] The first part 2521 can refer to the part of the protrusion 252 connected to the adapter 233. The second part 2522 can refer to the part of the protrusion 252 away from the adapter 233.

[0127] The circumferential direction of the adapter 233 can refer to the circumferential direction of the adapter 233 parallel to the first direction X and the second direction Y. The size of the second portion 2522 is greater than the size of the first portion 2521 in the circumferential direction of the adapter 233 can be understood as referring to FIGS. 9 and 10, a stepped structure with a wide outer and a narrow inner can be formed between the second portion 2522 and the first portion 2521, similar to a hook structure, and because the shapes of the protrusion 252 and the groove 251 match each other, a same stepped groove can also be formed in the groove 251, so that after the protrusion 252 and the groove 251 are matched with each other, the protrusion 252 is not easy to be separated from the groove 251 along the first direction X and the second direction Y.

[0128] In the above technical solution, by setting the protrusion 252 to the above structure, a hook structure can be formed on the protrusion 252, which is not easy to be separated after being matched with the groove 251, which can reduce the probability of loosening between the adapter 233 and the first sealing portion 241, improve the connection reliability of the adapter 233 and the first sealing portion 241, and further improve the sealing reliability of the sealing structure 24 to the pole body 231, thereby improving the reliability of the battery monomer 20.

[0129] In some embodiments of the present application, referring to FIGS. 9 and 10, the two ends of the second portion 2522 are protruding relative to the two ends of the first portion 2521 in the circumferential direction of the adapter 233.

[0130] In the above technical solution, the opposite ends of the protrusion 252 can form a hook structure, which can further improve the connection reliability of the protrusion 252 and the groove 251, thereby further improving the sealing reliability of the sealing structure 24 to the pole body 231, and improving the reliability of the battery monomer 20.

[0131] In some embodiments of the present application, referring to FIG. 8, the thickness of the protrusion 252 is less than the thickness of the adapter 233 in the height direction of the pole body 231.

[0132] Referring to FIG. 8, the height direction of the pole body 231 can be the third direction Z of FIG. 8, the thickness of the protrusion 252 can be H1, and the thickness of the adapter 233 can be H2. As shown in FIG. 8, H1 is less than H2.

[0133] For example, the protrusion 252 is flush with the end surface of the adapter 233 at one end in the height direction of the pole body 231; or the protrusion 252 is flush with the end surface of the adapter 233 at the other end in the height direction of the pole body 231; or neither end of the protrusion 252 is flush with the end surface of the adapter 233 in the height direction of the pole body 231.

[0134] In the technical solution, the first sealing part 241 and the pole body 231 can always have a certain sealing contact surface in the height direction of the pole body 231, which is beneficial to reduce the risk of a leakage point between the protrusion 252 and the groove 251, improve the sealing reliability of the first sealing part 241 to the pole body 231, and further improve the overall sealing reliability of the sealing structure 24 to the pole body 231, and improve the reliability of the battery monomer 20. The above-mentioned scheme is also beneficial to reduce the size and weight of the protrusion 252, reduce the weight of the pole part 23 and the sealing structure 24, and further reduce the weight of the battery monomer 20, which is beneficial to improve the volumetric energy density of the battery monomer 20.

[0135] In some embodiments of the present application, referring to FIGS. 11-15, the second sealing part 242 is provided with a groove 251 or a protrusion 252.

[0136] The second sealing part 242 can be provided with a groove 251, and the adapter 233 is provided with a protrusion 252; or the second sealing part 242 can be provided with a protrusion 252, and the adapter 233 is provided with a groove 251.

[0137] In the above technical solution, since the second sealing part 242 is provided with a groove 251 or a protrusion 252, the position where the adapter 233 cooperates with the second sealing part 242 is the outer side, and there is more space for setting the protrusion 252 or the groove 251, which is beneficial to reduce the processing difficulty of the adapter 233 and reduce the cost. Moreover, whether the second sealing part 242 is provided with a groove 251 or a protrusion 252, the groove 251 and the protrusion 252 are located on the side of the adapter 233 away from the shell part 21. Since burrs are easily generated in the manufacturing process of the groove 251, the above-mentioned scheme can reduce the risk of burrs falling into the inside of the shell part 21, reduce the probability of burrs piercing the insulating material inside the shell part 21, causing the insulation performance between the positive and negative poles to decrease, and also reduce the probability of burrs and electrolyte reacting chemically to affect the chemical performance of the battery monomer 20, and the probability of burrs piercing the isolation film and damaging the electrode part 22, which is beneficial to improve the reliability of the battery monomer 20.

[0138] In some embodiments of the present application, referring to FIGS. 11-15, the second sealing part 242 is provided with a protrusion 252, and the adapter 233 is provided with a groove 251.

[0139] In the technical solution, the second sealing part 242 is compressed and deformed to play a sealing role, the protrusion 252 is arranged on the second sealing part 242, compared with the groove 251 arranged on the second sealing part 242, the thickness of the second sealing part 242 is reduced, and the sealing performance of the second sealing part 242 is weakened. The technical solution can make the second sealing part 242 have a large compression amount during the compression of the second sealing part 242 on the shell wall by the pole body 231, and the second sealing part 242 can have good sealing performance between the pole body 231 and the shell wall, which is beneficial to improve the sealing performance of the battery monomer 20 and improve the reliability of the battery monomer 20.

[0140] In some embodiments of the present application, referring to FIGS. 13 and 15, the groove 251 includes a first groove part 2511 and a second groove part 2512 connected in communication, the second groove part 2512 is arranged on a side of the first groove part 2511 away from the second sealing part 242, and the width of the second groove part 2512 is smaller than the width of the first groove part 2511.

[0141] Referring to FIGS. 13 and 15, the second groove part 2512 is arranged on a side of the first groove part 2511 away from the second sealing part 242, and the width of the second groove part 2512 is smaller than the width of the first groove part 2511. It can be understood that the groove 251 is in the form of a stepped groove with an inner width and an outer narrowness, and correspondingly, the protrusion 252 is in the form of a hook structure. In this way, after the protrusion 252 and the groove 251 cooperate with each other, the protrusion 252 is not easy to be separated from the groove 251 along the first direction X and the second direction Y.

[0142] In the technical solution, the groove 251 is arranged in the above structure, the groove 251 can form a stepped groove, and is not easy to be separated after cooperating with the protrusion 252. The probability of loosening between the adapter 233 and the second sealing part 242 can be reduced, the connection reliability of the adapter 233 and the second sealing part 242 can be improved, and the sealing reliability of the sealing structure 24 to the pole body 231 can be improved, thereby improving the reliability of the battery monomer 20.

[0143] Optionally, referring to FIG. 13, the shape of the second groove part 2512 can be conical, and the width of the second groove part 2512 gradually decreases in the direction close to the first groove part 2511. The machining precision requirement of the conical groove is low, the machining difficulty can be reduced, and the cost can be reduced.

[0144] Optionally, referring to FIG. 15, the shape of the second groove 2512 can be spherical. The spherical groove can uniformly disperse the force received by the protrusion 252 in all directions, reduce local stress concentration, and the spherical groove and the protrusion 252 can have a larger contact area, thereby providing stronger connection strength. In addition, the spherical groove can also make the protrusion 252 easier to align and insert during installation, thereby improving installation efficiency and accuracy and reducing installation errors.

[0145] In some embodiments of the present application, referring to FIGS. 9, 10, and 12, the grooves 251 and the protrusions 252 are symmetrically arranged on at least opposite sides of the adapter 233.

[0146] It can be understood that the grooves 251 and the protrusions 252 can be arranged on opposite sides of the adapter 233 in the first direction X, or the grooves 251 and the protrusions 252 can be arranged on opposite sides of the adapter 233 in the second direction Y, or the grooves 251 and the protrusions 252 can be arranged on opposite sides of the adapter 233 in the first direction X and on opposite sides of the adapter 233 in the second direction Y.

[0147] In the above technical solution, at least opposite sides of the adapter 233 and the sealing structure 24 can be inserted and connected, which can better limit and fix the adapter 233 and the sealing structure 24, improve the combination reliability of the adapter 233 and the sealing structure 24, reduce the risk of sealing failure between the adapter 233 and the sealing structure 24 due to unreliable connection, and further improve the sealing reliability of the sealing structure 24 to the pole piece 23 and the reliability of the battery monomer 20.

[0148] In some embodiments of the present application, referring to FIGS. 9, 10, and 12, the grooves 251 and the protrusions 252 are a plurality of grooves and protrusions, and are arranged at intervals along the circumference of the adapter 233.

[0149] In the above technical solution, by increasing the number of grooves 251 and protrusions 252, more insertion and connection structures can be provided along the circumference of the adapter 233 and the sealing structure 24, thereby improving the connection reliability of the adapter 233 and the sealing structure 24, and the adapter 233 can better constrain the sealing structure 24, further reducing the probability of deformation or displacement of the sealing structure 24, further improving the sealing reliability of the sealing structure 24, and improving the reliability of the battery monomer 20.

[0150] In some embodiments of the present application, the sealing structure 24 is injection molded on the adapter 233.

[0151] In the technical solution, the sealing structure 24 is injection molded on the adapter 233, which can form a seamless connection between the sealing structure 24 and the adapter 233, effectively prevent the internal substances of the battery monomer 20 from leaking and external impurities from entering, and improve the reliability of the sealing. The above structure can also make the sealing structure 24 more evenly distributed on the adapter 233, which can withstand pressure from all directions. This uniform stress feature helps to improve the stability of the sealing and reduce the problem of sealing failure caused by uneven local stress. On the other hand, the above scheme can also make the sealing structure 24 and the adapter 233 more firmly fixed, reduce the installation steps, simplify the assembly steps, improve the production efficiency, and also help to accurately control the size and shape of the sealing structure 24, so that the sealing structure 24 and the adapter 233 can be more perfectly matched, reducing the installation problems caused by size deviation, and improving the production efficiency and product quality.

[0152] In some embodiments of the present application, referring to FIGS. 3, 4, 17 and 18, the shell component 21 includes a first wall 201 provided with a mounting hole 201a, the pole component 23 includes a connecting component 232 and a first insulating component 234, the pole body 231 is connected to the electrode component 22, the connecting component 232 is connected to the first wall 201 and is in insulated connection with the pole body 231 through the first insulating component 234; wherein the connecting component 232 includes a vertical arm 2321 extending away from the first wall 201, and a projection of the vertical arm 2321 on the first wall 201 at least partially overlaps a projection of the pole body 231 on the first wall 201 along the thickness direction of the first wall 201.

[0153] The shell component 21 can include a plurality of shell walls that communicate to form an outer shell structure. The first wall 201 can be one of the plurality of shell walls, which can be, but is not limited to, a top wall, a bottom wall, a front side wall, a rear side wall, a left side wall, or a right side wall of the shell component 21, and the like. The number of shell walls varies according to the shape of the shell component 21, which can be, but is not limited to, a cuboid, a cube, a cylinder, and the like. For example, referring to FIGS. 3 and 16, the shape of the shell component 21 is a cuboid, and the first wall 201 is a top wall of the shell component 21.

[0154] The connecting component 232 can be a component for connecting the pole body 231 and the adapter 233.

[0155] The first insulation member 234 can refer to a member for insulating between the connecting member 232 and the pole body 231. The material of the first insulation member 234 can be, but is not limited to, rubber or plastic, etc., wherein the rubber can be, but is not limited to, silicone rubber, fluororubber, etc., and the plastic can be, but is not limited to, polypropylene, polyethylene, etc. Since the shell member 21 is generally of metal material, the connecting member 232 is connected and fitted with the pole body 231 through the first insulation member 234, thereby reducing the risk of short circuit between the pole body 231 and the first wall 201, and improving the reliability of the battery monomer 20.

[0156] The "connecting member 232 includes a vertical arm 2321" can be understood as that the connecting member 232 can only include the vertical arm 2321, or the connecting member 232 can include other components in addition to the vertical arm 2321, and the other components of the connecting member 232 are not specifically limited in this example. The vertical arm 2321 can refer to a plate-shaped or block-shaped structural member standing relative to the first wall 201, and the vertical arm 2321 can generally refer to an arm plate with a thickness smaller than a height, thereby having greater strength and support. Exemplarily, the thickness direction of the vertical arm 2321 can refer to the second direction Y of FIGS. 17 and 18, and the height direction can refer to the third direction Z of FIGS. 17 and 18.

[0157] The "vertical arm 2321 extends in a direction away from the first wall 201" can be understood as that the vertical arm 2321 and the first wall 201 can be arranged at an included angle, which can refer to an angle greater than 0 degrees and less than 180 degrees, which is not limited here.

[0158] The "along the thickness direction of the first wall 201" can be exemplarily the thickness direction of the first wall 201 can refer to the third direction Z of FIG. 4.

[0159] The "projection of the vertical arm 2321 on the first wall 201 at least partially overlaps with the projection of the pole body 231 on the first wall 201" can be understood as that the projection of the vertical arm 2321 on the first wall 201 can partially overlap with the projection of the pole body 231 on the first wall 201 (refer to FIG. 18), or the entire projection of the vertical arm 2321 on the first wall 201 overlaps with the projection of the pole body 231 on the first wall 201. Whether the projection of the vertical arm 2321 partially overlaps with the projection of the pole body 231 or fully overlaps, the vertical arm 2321 can limit the pole body 231 in the thickness direction of the first wall 201, and when the pole body 231 is subjected to a force in the thickness direction of the first wall 201, the vertical arm 2321 can stop the pole body 231 through the first insulation member 234, thereby limiting displacement of the pole body 231.

[0160] Since the stand arm 2321 is a structure similar to a stand plate, the width is smaller than the height, so that the strength and supportability of the stand arm 2321 in the thickness direction of the first wall 201 are stronger. When the pole body 231 is subjected to an external force in the direction away from the first wall 201, the stand arm 2321 can provide stronger support and limiting action to the pole body 231, and since the probability of deformation of the stand arm 2321 is low, it can also provide more stable and reliable support and limiting action to the pole body 231. That is, by using the stand arm 2321 with the above structure, the overall structural strength of the pole component 23 can be improved, thereby improving the reliability of the pole component 23.

[0161] Especially for a battery monomer with a relatively thin thickness (the thickness of the battery monomer can refer to the size in the second direction Y of FIG. 16), such as a blade battery, etc., since the thickness of the battery monomer is small, the electrode component is usually arranged on the small surface of the shell component, so that the space left for the pole component is limited, and the size of the pole component is relatively small. Under the premise of ensuring the welding surface of the pole and the bus bar and the like to meet the requirements, it is difficult to improve the structural strength of the pole component. In the scheme of the present application, the stand arm 2321 and the pole body 231 adopt the above structure, which can reduce the size of the connecting component 232 in the thickness direction of the battery monomer 20 (refer to the second direction Y of FIG. 16) under the premise of improving the overall structural strength of the pole component 23, which is conducive to making the pole component 23 of the battery monomer 20 with a relatively thin thickness have higher strength, reducing the probability of fracture of the pole body 231 when subjected to an external force, improving the reliability of the pole component 23, and further improving the reliability of the battery monomer 20 with a relatively thin thickness. On the other hand, in the battery monomer 20 with a relatively thin thickness, the above structure is also conducive to increasing the area of the side of the pole body 231 away from the first wall 201 under the premise that the structural strength of the pole component 23 can meet the requirements, thereby increasing the area of the welding joint surface of the pole body 231 and the bus bar and the like, and improving the current carrying capacity of the pole body 231.

[0162] Secondly, in the battery monomer 20 of the above scheme, since the size of the connecting component 232 in the thickness direction of the battery monomer 20 can be relatively small, it is also conducive to reducing the volume of the connecting component 232, and further reducing the volume of the pole component 23, thereby improving the volume energy density of the battery monomer 20.

[0163] In the battery cell 20 with the above structure, since the projection of the stand arm 2321 on the first wall 201 at least partially overlaps with the projection of the pole body 231 on the first wall 201 in the thickness direction of the first wall 201, the stand arm 2321 can play a limiting role on the pole body 231, and since the stand arm 2321 has high strength in the thickness direction of the first wall 201 and is not prone to deformation, it can play a strong supporting role and better limiting role. When the pole body 231 is subjected to an external force in a direction away from the first wall 201, the stand arm 2321 can press against the pole body 231, so that the pole member 23 as a whole has high structural strength, reducing the probability of the pole body 231 being pulled out of the shell member 21. Secondly, the projection of the stand arm 2321 on the first wall 201 at least partially overlaps with the projection of the pole body 231 on the first wall 201, which can also reduce the probability of the pole body 231 and the connecting member 232 shaking, deforming or displacing when they are fitted together, and improve the installation stability of the pole body 231. That is, the above structure can improve the reliability of the pole member 23, and further improve the reliability of the battery cell 20.

[0164] In some embodiments of the present application, referring to FIGS. 17 and 18, the stand arm 2321 is arranged around the circumference of the pole body 231, the circumferential side of one of the stand arm 2321 and the pole body 231 is provided with a recess 2301, and the circumferential side of the other of the stand arm 2321 and the pole body 231 is provided with a protrusion 2302, at least part of the protrusion 2302 extends into the recess 2301, and the two are insulated by the first insulating member 234.

[0165] The "stand arm 2321 is arranged around the circumference of the pole body 231" can be understood as the stand arm 2321 being a ring-shaped arm plate, which is conducive to providing a limiting role to multiple positions around the circumference of the pole body 231, thereby enhancing the limiting effect of the stand arm 2321 on the pole body 231. Exemplarily, the stand arm 2321 is a ring-shaped member.

[0166] The recess 2301 can be, but is not limited to, a groove, a through hole, etc. The protrusion 2302 can refer to a structure protruding from the surface of the stand arm 2321 or the pole body 231. As an example, the protrusion 2302 can be a protruding tooth.

[0167] The circumferential side of the stand arm 2321 can be provided with the recess 2301, and the recess 2301 can be one or more. When there are multiple recesses 2301, the multiple recesses 2301 are arranged at intervals along the circumferential side of the stand arm 2321. The pole body 231 can be provided with the protrusion 2302, and the protrusion 2302 can be one or more. When there are multiple protrusions 2302, the multiple protrusions 2302 are arranged at intervals along the circumferential side of the pole body 231.

[0168] The protrusions 2302 can also be arranged on the circumferential side of the standing arm 2321, and there can be one or more protrusions 2302, and when there are multiple protrusions 2302, the multiple protrusions 2302 are arranged at intervals along the circumferential side of the standing arm 2321. The pole body 231 can be provided with recesses 2301, and there can be one or more recesses 2301, and when there are multiple recesses 2301, the multiple recesses 2301 are arranged at intervals along the circumferential side of the pole body 231.

[0169] The "at least part of the protrusions 2302 extends into the recesses 2301" can mean that part of the protrusions 2302 extends into the recesses 2301, or the protrusions 2302 all extend into the recesses 2301.

[0170] The "the standing arm 2321 and the pole body 231 are insulated by the first insulation 234" can be understood as that the first insulation 234 is at least partially arranged between the standing arm 2321 and the pole body 231, so that the standing arm 2321 and the pole body 231 are insulated from each other. Correspondingly, it can be understood that a gap will be reserved between the protrusions 2302 and the recesses 2301, and the first insulation 234 will be filled in the gap, so that the protrusions 2302 and the recesses 2301 are insulated from each other.

[0171] In the above technical solution, the standing arm 2321 and the pole body 231 can be embedded with each other through the protrusions 2302 and the recesses 2301, so as to increase the structural strength of the standing arm 2321 and the pole body 231 as a whole. When the pole body 231 is subjected to an external force in a direction away from the first wall 201, the embedded structure formed by the standing arm 2321 and the pole body 231 can better withstand stress, which is conducive to reducing the probability of deformation or damage, and further reducing the probability of the pole body 231 being pulled away from the standing arm 2321. The standing arm 2321 and the pole body 231 can also be mechanically locked through the protrusions 2302 and the recesses 2301, so that the connection between the standing arm 2321 and the pole body 231 is more firm, which is conducive to maintaining a relatively stable positional relationship between the standing arm 2321 and the pole body 231 when the battery monomer 20 is subjected to vibration, impact or other external forces, and is not prone to loosening or displacement. It can be seen that the standing arm 2321 and the pole body 231 with the above structure can further improve the reliability and stability of the pole part 23 as a whole, and further improve the reliability of the battery monomer 20.

[0172] Embodiment one

[0173] The battery monomer 20 provided by the embodiments of the present application comprises a shell part 21, an electrode part 22, a pole part 23 and a sealing structure 24.

[0174] The shell part 21 is provided with a mounting hole 201a. The electrode part 22 is accommodated in the shell part 21.

[0175] The pole column component 23 is installed in the mounting hole 201a and includes a pole column body 231, a connecting component 232, an adapter 233, and a first insulation component 234. The pole column body 231 is connected with the electrode component 22, the connecting component 232, the adapter 233, and the first insulation component 234 are annularly arranged around the pole column body 231, the adapter 233 is an adapter plate and is welded to the shell component 21, the connecting component 232 is a welded pressure ring and is welded to the adapter 233, and the first insulation component 234 is an injection molded component and is injection molded between the connecting component 232 and the pole column body 231 to insulate the connecting component 232 and the pole column body 231.

[0176] The sealing structure 24 is a sealing ring and is insertedly fitted with the adapter 233. The sealing structure 24 is an injection molded component, and in manufacturing, the adapter 233 can be placed in a production mold of the sealing ring, so that the sealing structure 24 is injection molded on the adapter 233 to manufacture an integrated structure. The inner ring side of the adapter 233 is provided with a plurality of protrusions 252, and the outer periphery of the sealing structure 24 is provided with a plurality of grooves 251. The plurality of grooves 251 and the plurality of protrusions 252 are one-to-one correspondingly arranged and insertedly fitted, so that a mosaic structure can be formed between the sealing structure 24 and the adapter 233, and the phenomenon of position deviation or overturning of the sealing structure 24 in the assembly process with the pole column body 231 can be prevented.

[0177] Embodiment Two

[0178] Another battery monomer 20 is provided in the embodiment. The structure of the battery monomer 20 in the embodiment is substantially the same as that of the battery monomer 20 in the first embodiment, except that the side of the adapter 233 away from the shell component 21 is provided with a plurality of grooves 251, the plurality of grooves 251 are blind grooves and are arranged at intervals along the circumference of the adapter 233, and the circumferential side of the sealing structure 24 is provided with a plurality of protrusions 252, the plurality of protrusions 252 and the plurality of grooves 251 are one-to-one correspondingly arranged and insertedly fitted.

[0179] In the second aspect, the embodiment of the present application provides a battery device 100, comprising the battery monomer 20 of any one of the preceding.

[0180] In the above technical solution, since the sealing structure 24 of the battery monomer 20 has high sealing reliability, the reliability of the battery monomer 20 can be improved, thereby facilitating the improvement of the reliability of the battery device 100.

[0181] In the third aspect, the embodiment of the present application provides a power utilization device 1000, comprising the battery monomer 20 of any one of the preceding or the battery device 100 of the preceding.

[0182] In the above technical solution, the battery monomer 20 can have high reliability due to the high sealing reliability of the sealing structure 24 of the battery monomer 20, and the battery device 100 using the battery monomer 20 also has high reliability, thereby improving the reliability of the power consumption device 1000 including the battery monomer 20 or the battery device 100.

[0183] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0184] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, all the embodiments and optional embodiments of the present application can be combined to form new technical solutions without special description. If there is no special description, all the technical features and optional technical features of the present application can be combined to form new technical solutions. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell, wherein, include: The housing component is provided with mounting holes; Electrode components are housed within the housing component; The pole piece is installed at the mounting hole and connected to the electrode piece; A sealing structure, in conjunction with the pole component, achieves a seal on the housing component at the mounting hole; Wherein, the sealing structure and the pole component are inserted into each other; and / or, the sealing structure is inserted into the housing component.

2. The battery cell of claim 1, wherein, The electrode component includes an electrode body and an adapter. The electrode body is installed in the mounting hole through the adapter and connected to the electrode component. The adapter and the sealing structure are inserted into each other and surround the electrode body.

3. The battery cell of claim 2, wherein, One of the sealing structure and the adapter is provided with a groove, and the other is provided with a protrusion, with the protrusion located within the groove.

4. The battery cell of claim 3, wherein, The sealing structure includes a first sealing part and a second sealing part connected together. The first sealing part is located on the inner side of the adapter near the electrode body, and the second sealing part is located on the outer side of the adapter away from the electrode component and extends away from the electrode body.

5. The battery cell of claim 4, wherein, The first sealing part is provided with the groove or the protrusion.

6. The battery cell of claim 5, wherein, The first sealing part is provided with the groove, and the adapter is provided with the protrusion.

7. The battery cell of claim 6, wherein, The protrusion includes a first part and a second part. The first part is connected to the adapter, and the second part is located on the side of the first part near the pole body. In the circumferential direction of the adapter, the size of the second part is larger than the size of the first part.

8. The battery cell of claim 7, wherein, In the circumferential direction of the adapter, the two ends of the second part protrude relative to the two ends of the first part.

9. The battery cell of any one of claims 6-8, wherein, In the height direction of the pole body, the thickness of the protrusion is less than the thickness of the adapter.

10. The battery cell of claim 4, wherein, The second sealing part is provided with the groove or the protrusion.

11. The battery cell of claim 10, wherein, The second sealing part is provided with the protrusion, and the adapter is provided with the groove.

12. The battery cell of claim 10, wherein, The groove includes a first groove and a second groove that are connected to each other. The second groove is located on the side of the first groove away from the second sealing part, and the width of the second groove is smaller than the width of the first groove.

13. The battery cell of any one of claims 3-12, wherein, The grooves and protrusions are symmetrically arranged on at least two opposite sides of the adapter.

14. The battery cell of any one of claims 3-13, wherein, There are multiple grooves and protrusions, which are spaced apart along the circumference of the adapter.

15. The battery cell of any one of claims 2-14, wherein, The sealing structure is injection molded onto the adapter.

16. The battery cell of any one of claims 2-15, wherein, The housing component includes a first wall with the mounting hole. The electrode component includes a connecting component and a first insulating component. The electrode body is connected to the electrode component. The connecting component is connected to the first wall and is insulated from the electrode body by the first insulating component. The connecting component includes a vertical arm that extends away from the first wall. Along the thickness direction of the first wall, the projection of the vertical arm on the first wall at least partially overlaps with the projection of the electrode body on the first wall.

17. A battery device, wherein, include: The battery cell as described in any one of claims 1 to 16.

18. An electrical device, comprising: include: The battery cell as described in any one of claims 1 to 16, or the battery device as described in claim 17.

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