Battery cell, battery device and electric device

Abstract

The utility model discloses a battery monomer, a battery device and a power utilization device. The battery monomer comprises a shell, a pole, a first insulating part and a second insulating part, the shell comprises a first wall, and a via hole is formed in the first wall; the pole penetrates through the via hole. The first insulating member insulates and isolates the first wall and the post. The second insulating member is connected to the first insulating member. The second insulating member insulates and isolates the first wall and the post. The first insulating part is arranged on the periphery of the second insulating part in a surrounding mode. The melting point of the second insulating member is higher than that of the first insulating member. Since the melting point of the second insulating part is higher than that of the first insulating part, even if the first insulating part is melted under an extremely high temperature condition, the first wall of the shell and the pole can still be insulated and isolated through the second insulating part, so that the probability of short circuit between the pole and the shell can be reduced, and the service life of the shell is prolonged. And the probability of short-circuit firing of the battery monomers can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery device and a power utilization device. BACKGROUND

[0002] In order to avoid short circuit between the shell and the pole, an insulating component is arranged between the pole and the shell. However, when the battery monomer is in a high temperature environment, the insulating component is easy to melt under the action of high temperature, which will cause short circuit between the pole and the shell, thereby causing the battery monomer to short circuit and catch fire. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a battery monomer, a battery device and a power utilization device, which can solve the problem of short circuit and fire of the battery monomer caused by short circuit between the pole and the shell.

[0004] The battery monomer of the present application embodiment comprises a shell, a pole, a first insulating component and a second insulating component. The shell comprises a first wall, and the first wall is formed with a through hole; the pole is arranged in the through hole. The first insulating component insulates and separates the first wall and the pole. The second insulating component is connected with the first insulating component. The second insulating component insulates and separates the first wall and the pole. Wherein, the first insulating component is arranged around the periphery of the second insulating component. The melting point of the second insulating component is higher than the melting point of the first insulating component.

[0005] In the battery monomer of the present application embodiment, since the melting point of the second insulating component is higher than the melting point of the first insulating component, even if the first insulating component melts under extreme high temperature conditions, the first wall of the shell and the pole can still be insulatively separated by the second insulating component, thereby reducing the probability of short circuit between the pole and the shell, and further reducing the probability of short circuit and fire of the battery monomer.

[0006] In addition, under normal working temperature, the first insulating component and the second insulating component jointly act to provide double insulation protection between the pole and the shell. This double protection mechanism effectively reduces the possibility of short circuit between the pole and the shell, thereby reducing the risk of fire caused by short circuit of the battery monomer. And since the first insulating component is arranged around the periphery of the second insulating component, the first insulating component can protect the second insulating component, so that the second insulating component is not easy to be disturbed by external environmental factors during use, thereby prolonging the service life of the second insulating component.

[0007] In some embodiments, the battery cell further comprises a limiting component. The limiting component is connected with the pole column, and is arranged on one side of the first wall in the thickness direction. A part of the first insulating component is arranged between the first wall and the limiting component, and another part of the first insulating component is arranged between the first wall and the pole column and extends into the through hole. The second insulating component is arranged between the first wall and the limiting component.

[0008] In this way, the limiting component can be used to limit and fix the position of the pole column, thereby reducing the probability of displacement of the pole column during use. The first insulating component can separate the first wall and the limiting component in the thickness direction, thereby blocking the current between the limiting component and the first wall. The first insulating component can also separate the first wall and the pole column, thereby blocking the current between the pole column and the first wall. The second insulating component can separate the limiting component and the first wall in the thickness direction, thereby blocking the current between the limiting component and the first wall.

[0009] Therefore, the first insulating component and the second insulating component can both insulate and separate the limiting component and the first wall, and the first insulating component can insulate and separate the pole column and the first wall, thereby reducing the probability of short circuit between the pole column and the shell, and further reducing the probability of fire caused by short circuit of the battery cell.

[0010] In some embodiments, the first insulating component is provided with a first mounting groove. The first mounting groove extends through the first insulating component in the thickness direction of the first insulating component. The second insulating component is arranged in the first mounting groove and is supported between the two side surfaces of the first wall and the limiting component arranged adjacent to each other.

[0011] In this way, the first mounting groove can serve as a void area to facilitate the installation of the second insulating component. In addition, the second insulating component can separate the two side surfaces of the first wall and the limiting component arranged adjacent to each other in the case of melting of the first insulating component, thereby maintaining the insulation and separation between the first wall and the limiting component, thereby reducing the probability of short circuit between the limiting component and the first wall, and further reducing the probability of short circuit between the pole column and the shell, and further reducing the probability of fire caused by short circuit of the battery cell.

[0012] In some embodiments, the first wall is provided with a second mounting groove. The second mounting groove is arranged corresponding to the first mounting groove. The second insulating component is arranged in the first mounting groove and the second mounting groove.

[0013] In this way, through the second mounting groove, the second insulating component can be more easily placed and fixed at a predetermined position without the need for additional adjustment or alignment steps, thereby simplifying the installation process and reducing the possibility of displacement of the second insulating component during use.

[0014] In some embodiments, the first installation groove is annular in shape. The second insulation component is annular in shape.

[0015] In this way, the annular structure can provide a continuous and continuous insulation path, which helps to improve the insulation performance of the battery cell. In a high temperature environment, the annular structure can more effectively maintain the insulation isolation between the limiting component and the first wall, thereby reducing the probability of short circuit between the limiting component and the first wall, thereby reducing the probability of short circuit between the pole and the shell, and further reducing the probability of battery cell short circuit and fire.

[0016] In addition, since the annular structure usually only needs to be positioned once, the installation process of the annular structure is simple.

[0017] In some embodiments, the number of first installation grooves and second insulation components is multiple and one-to-one correspondence, and the first installation grooves and second insulation components are arranged in the circumferential direction of the first insulation component.

[0018] In this way, the second insulation component can provide insulation function in multiple areas of the circumferential direction of the first insulation component, thereby more effectively maintaining the insulation isolation between the limiting component and the first wall, thereby reducing the probability of short circuit between the limiting component and the first wall, thereby reducing the probability of short circuit between the pole and the shell, and further reducing the probability of battery cell short circuit and fire.

[0019] In addition, when replacement or maintenance is required, the design of multiple second insulation components allows damaged second insulation components to be replaced individually without replacing the entire second insulation component, reducing maintenance cost and complexity.

[0020] In some embodiments, the first insulation component includes a first part and a second part, the second part is connected to the edge of the first part and protrudes from one side of the first part, the first part is supported between the two side surfaces of the first wall and the limiting component, and the second part is supported between the two side surfaces of the first wall and the pole.

[0021] In this way, the first part can separate the first wall and the limiting component, and the second part can separate the first wall and the pole. Therefore, the first insulation component can not only maintain the insulation isolation between the first wall and the limiting component, but also maintain the insulation isolation between the first wall and the pole.

[0022] In some embodiments, a portion of the first insulation member is supported between two side surfaces of the first wall and the limiting member, the second insulation member is supported between two side surfaces of the first wall and the limiting member, a gap is formed between the first wall and the pole, and the battery cell further comprises a sealing member, which is arranged at the gap and supported between two side surfaces of the first wall and the pole.

[0023] Thus, at normal working temperature, the limiting member can apply a force to the first insulation member, and then to the first wall, and then to the sealing member between the first wall and the pole. After the first insulation member melts under high temperature, the limiting member can apply a force to the second insulation member, and then to the first wall, and then to the sealing member between the first wall and the pole. Thus, the second insulation member can maintain the compression amount of the sealing member after the first insulation member melts under high temperature, thereby maintaining the sealing performance of the battery cell.

[0024] In addition, the sealing member can seal the gap between the first wall and the pole, thereby reducing the probability of liquid, dust or other contaminants entering the inside of the battery cell, and reducing the probability of electrolyte leakage in the battery cell, thereby improving the sealing performance of the battery cell. In addition, since the sealing member is supported between two side surfaces of the first wall and the pole, the sealing member can also provide insulation isolation function.

[0025] In some embodiments, the pole comprises a third portion and a fourth portion, the third portion protrudes from one side of the fourth portion, the third portion penetrates the through hole, the third portion is connected with the limiting member, a first gap is formed between the third portion and the first wall, a second gap is formed between the fourth portion and the first wall, the gap comprises the first gap and the second gap, and the sealing member is arranged at the first gap and the second gap.

[0026] Thus, the sealing member can seal the first gap and the second gap at the same time, thereby reducing the probability of liquid, dust or other contaminants entering the inside of the battery cell, and reducing the probability of electrolyte leakage in the battery cell, thereby improving the sealing performance of the battery cell.

[0027] In some embodiments, the sealing member comprises a first sealing part and a second sealing part connected with the first sealing part at an angle, the first sealing part is arranged at the first gap and supported between two side surfaces of the first wall and the third portion, and the second sealing part is arranged at the second gap and supported between two side surfaces of the first wall and the fourth portion.

[0028] Thus, the first sealing part is arranged at the first gap, and the second sealing part is arranged at the second gap, so that the sealing member can seal the first gap and the second gap at the same time, thereby reducing the probability of liquid, dust or other contaminants entering the inside of the battery monomer, and reducing the probability of electrolyte leakage in the battery monomer, thereby improving the sealing performance of the battery monomer. Moreover, since the first sealing part and the second sealing part are angularly connected, the installation and replacement steps of the sealing part are simple, which helps to reduce the assembly time.

[0029] In addition, since the first sealing part is supported between the two side surfaces adjacent to the first wall and the third part, and the second sealing part is supported between the two side surfaces adjacent to the first wall and the fourth part, the sealing member can not only maintain the insulation isolation between the first wall and the third part, but also maintain the insulation isolation between the first wall and the fourth part.

[0030] In some embodiments, the battery monomer further comprises a limiting member connected with the first wall, at least part of the limiting member is arranged on one side of the thickness direction of the first wall, the pole column is provided with a third mounting groove, the second insulation part is arranged in the third mounting groove, at least part of the first insulation part is arranged between the limiting member and the second insulation part, and the second insulation part and at least part of the first insulation part are arranged between the pole column and the limiting member.

[0031] Thus, through the third mounting groove, the second insulation part can be placed and fixed in the predetermined position more easily, without the need for additional adjustment or alignment steps, thereby simplifying the installation process and reducing the possibility of displacement of the second insulation part during use.

[0032] In addition, the first insulation part can separate the limiting member and the second insulation part, and the second insulation part and at least part of the first insulation part can separate the pole column and the limiting member, so that the first insulation part can block the current between the limiting member and the second insulation part, and block the current between the pole column and the limiting member. The second insulation part can block the current between the pole column and the limiting member. Therefore, even if the first insulation part melts under extreme high temperature conditions, the limiting member and the pole column can still maintain insulation isolation through the second insulation part, thereby reducing the probability of short circuit between the pole column and the shell, and further reducing the probability of short circuit and fire of the battery monomer.

[0033] In some embodiments, the pole column comprises a third part and a fourth part, the third part protrudes from one side of the fourth part, the fourth part surrounds the periphery of the third part, and the fourth part forms the third mounting groove.

[0034] Thus, since the fourth portion is arranged around the periphery of the third portion, the fourth portion is more likely to contact the limiting component after the first insulating component melts. Therefore, the third mounting groove is arranged on the fourth portion, which can reduce the probability of the limiting component short-circuiting with the pole, thereby reducing the probability of the pole and the shell short-circuiting, and further reducing the probability of the battery cell short-circuiting and catching fire.

[0035] In some embodiments, the limiting component comprises a body portion and an extension portion extending towards the pole, the body portion is connected with the first wall, and the extension portion is arranged opposite to the fourth portion. At least part of the first insulating component is arranged between the extension portion and the second insulating component, and the second insulating component and at least part of the first insulating component are both arranged between the fourth portion and the extension portion.

[0036] Thus, the second insulating component and at least part of the first insulating component can separate the fourth portion and the extension portion, thereby blocking the current between the fourth portion and the extension portion. The first insulating component can separate the extension portion and the second insulating component, thereby blocking the current between the extension portion and the second insulating component. In this way, even if the first insulating component melts under high temperature, the second insulating component can still separate the extension portion and the fourth portion, thereby insulating and separating the pole and the limiting component, thereby reducing the probability of the shell and the pole short-circuiting, and further reducing the probability of the battery cell short-circuiting and catching fire.

[0037] In some embodiments, at least part of the first insulating component is supported between two side surfaces of the third portion and the extension portion arranged adjacent to each other.

[0038] Thus, the support of the first insulating component between the third portion and the extension portion helps to maintain the insulation and separation between the two components, thereby reducing the probability of the shell and the pole short-circuiting, and further reducing the probability of the battery cell short-circuiting and catching fire.

[0039] In some embodiments, the second insulating component comprises a main body portion, and the main body portion is provided with a groove recessed in the main body portion in a direction away from the first insulating component.

[0040] Thus, in the case of using the injection molding process for the first insulating component, the groove arranged on the main body portion facilitates the flow of plastic during the injection of the first insulating component, thereby reducing the probability of local material collapse of the first insulating component.

[0041] In some embodiments, the first wall is a cover of the shell.

[0042] In some embodiments, the melting point of the second insulating component is greater than or equal to 260℃.

[0043] Therefore, the second insulating component is not easy to melt when the battery cell is in a high temperature environment, thereby reducing the probability of short circuit between the shell and the pole, and further reducing the probability of fire caused by short circuit of the battery cell.

[0044] In some embodiments, the second insulating component is made of one of ceramic, polyimide or liquid crystal polymer.

[0045] Therefore, by using one of ceramic, polyimide or liquid crystal polymer to manufacture the second insulating component, the second insulating component not only has good heat resistance, but also has good insulation performance, thereby reducing the probability of short circuit between the shell and the pole, and further reducing the probability of fire caused by short circuit of the battery cell.

[0046] The battery device of the embodiments of the present application comprises a plurality of battery cells according to any one of the above embodiments.

[0047] Since the battery device comprises the above battery cell, the battery device at least comprises all the advantages of the above battery cell, which will not be repeated here.

[0048] The power consuming device of the embodiments of the present application comprises the battery cell according to any one of the above embodiments or the battery device described in the above embodiments.

[0049] Since the power consuming device comprises the above battery cell or battery device, the power consuming device at least comprises all the advantages of the above battery cell or battery device, which will not be repeated here.

[0050] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear, the embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0051] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in all the drawings represent the same or similar elements. In the drawings:

[0052] Figure 1 is a structural schematic diagram of a power consuming device provided by some embodiments of the present application;

[0053] Figure 2 is an exploded schematic diagram of a battery device provided by some embodiments of the present application;

[0054] Figure 3is an explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0055] Figure 4 is an explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0056] Figure 5 is a structural schematic diagram of a battery cell provided by some embodiments of the present application;

[0057] Figure 6 is Figure 5 an A-A direction sectional view of the battery cell of

[0058] Figure 7 is Figure 6 an enlarged schematic diagram of a portion of

[0059] Figure 8 is a partial structural explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0060] Figure 9 is a partial structural explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0061] Figure 10 is a partial structural explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0062] Figure 11 is a partial structural explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0063] Figure 12 is a partial structural explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0064] Figure 13 is a partial structural explosion schematic diagram of a battery cell provided by some embodiments of the present application;

[0065] Figure 14 is a partial structural schematic diagram of a battery cell provided by some embodiments of the present application;

[0066] Figure 15 is Figure 14 a B-B direction sectional view of the battery cell of

[0067] BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Battery cell 100; housing 10; first wall 11; via hole 110; pole 20; first insulating part 30; second insulating part 40; electrode assembly 50; third insulating part 60; adapter 70; limiting part 80; first mounting groove 31; second mounting groove 111; first part 32; second part 33; gap 101; sealing part 90; third part 21; fourth part 22; first gap 1010; second gap 1011; first sealing part 91; second sealing part 92; third mounting groove 23; body part 81; extension part 82; main body part 41; recess 42; electric device 1000; controller 1001; motor 1002; battery device 200; box 201; first box 202; second box 203. DETAILED DESCRIPTION

[0069] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and the claims and the above description of the drawings are intended to cover the non-exclusive inclusion.

[0071] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0072] In this paper, the "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0073] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0074] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0075] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0076] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0077] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of the battery, the demand of the market is also increasing.

[0078] In order to prevent the short circuit of the pole and the shell, a first insulating part made of plastic material is usually arranged between the pole and the shell. When the temperature of the battery monomer is high, such as when the pole is in an extremely high temperature state, the first insulating part of the battery monomer is easy to melt, which will cause the first wall of the pole and the shell in the battery monomer to contact, thereby causing the short circuit between the pole and the shell, thereby causing the short circuit of the battery monomer.

[0079] In order to solve the problem that the first insulation component is easy to melt, the melting point of the first insulation component can be increased. However, the melting point of the plastic material is difficult to meet the requirement. If the first insulation component is replaced by other materials, the toughness requirement cannot be met, and the first insulation component is easy to be interfered by external environmental factors, so that the first insulation component is easy to wear during use, thereby reducing the service life of the first insulation component.

[0080] Based on the above considerations, the embodiments of the present application provide a battery monomer, which is provided with a second insulation component connected with the first insulation component. The second insulation component also insulates and separates the first wall and the pole. The melting point of the second insulation component is higher than that of the first insulation component. In this way, even if the first insulation component melts under extreme high temperature conditions, the first wall of the shell and the pole can still be insulated and separated by the second insulation component, thereby reducing the probability of short circuit between the pole and the shell, and further reducing the probability of fire caused by short circuit of the battery monomer.

[0081] In addition, under normal working temperature, the first insulation component and the second insulation component jointly act to provide double insulation protection between the pole and the shell. This double protection mechanism effectively reduces the possibility of short circuit between the pole and the shell, thereby reducing the risk of fire caused by short circuit of the battery monomer. The first insulation component is arranged around the periphery of the second insulation component.

[0082] In order to prolong the service life of the second insulation component, the first insulation component can be arranged around the periphery of the second insulation component. Therefore, the first insulation component can protect the second insulation component, so that the second insulation component is not easy to be interfered by external environmental factors during use, thereby prolonging the service life of the second insulation component.

[0083] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of the power utilization device 1000 provided by some embodiments of the present application. The technical solutions described in the embodiments of the present application are applicable to various power utilization devices 1000 using the battery monomer 100, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc.

[0084] The following embodiments are described for convenience of illustration, taking a power utilization device 1000 of an embodiment of the present application as an example of a vehicle.

[0085] The vehicle is provided with a battery device 200, which can be arranged at the bottom, head or tail of the vehicle. The battery device 200 can be used for power supply of the vehicle, for example, the battery device 200 can be used as an operating power source of the vehicle.

[0086] The vehicle can further include a controller 1001 and a motor 1002, the controller 1001 being configured to control the battery apparatus 200 to supply power to the motor 1002, for example, for power requirements of the vehicle during startup, navigation, and travel.

[0087] In embodiments of the present application, the battery apparatus 200 can not only serve as an operating power source for the vehicle, but also serve as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0088] Please refer to Figure 2 , Figure 2 is an exploded schematic view of the battery apparatus 200 provided by some embodiments of the present application. The battery apparatus 200 (Battery Apparatus) referred to in embodiments of the present application can include one or more battery cell 100 assemblies for providing voltage and capacity. The battery cell 100 assembly can include a plurality of battery cells 100 connected in series, in parallel, or in a mixed connection through busbar components.

[0089] In embodiments of the present application, the battery cell 100 can be a secondary battery, which refers to a battery cell 100 that can be activated by charging after discharging.

[0090] The battery cell 100 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., which is not limited in embodiments of the present application.

[0091] In some embodiments, the battery cell 100 assembly is typically formed by arranging a plurality of battery cells 100.

[0092] As an example, the battery cell 100 assembly can be a battery module formed by arranging and fixing a plurality of battery cells 100 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 100 with a cable tie.

[0093] In some embodiments, the battery apparatus 200 can be a battery pack including a box 201 and one or more battery cell 100 assemblies, the battery cell 100 assemblies being accommodated in the box 201.

[0094] As an example, the battery cell 100 assembly can be a battery module, and the battery cell 100 assembly can be accommodated in the box 201 by fixing the battery module in the box 201.

[0095] As an example, the battery monomer 100 assembly can also be accommodated in the box 201 by directly fixing a plurality of battery monomers 100 to the box 201.

[0096] As an example, the box 201 can include a first box 202 and a second box 203. The first box 202 and the second box 203 are buckled so that a closed space is formed inside the box 201 to accommodate the battery monomer 100 assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box 202 can be a top cover or a bottom plate.

[0097] As an example, the box 201 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that a closed space is formed inside the box 201 to accommodate the battery monomer 100 assembly.

[0098] In some embodiments, the box 201 can be part of the chassis structure of the vehicle. For example, part of the box 201 can be at least part of the floor of the vehicle, or part of the box 201 can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0099] In some embodiments, the battery device 200 can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0100] Please refer to Figures 3 to 7 , Figure 3 is an explosion schematic diagram of the battery monomer 100 provided by some embodiments of the present application, Figure 4 is an explosion schematic diagram of the battery monomer 100 provided by some embodiments of the present application, Figure 5 is a structural schematic diagram of the battery monomer 100 provided by some embodiments of the present application, Figure 6 is Figure 5 is an A-A direction sectional view of the battery monomer 100 of Figure 7 is Figure 6 is an enlarged schematic diagram of the a part of the battery monomer 100 of the present application. The battery monomer 100 of the present application includes a shell 10, a pole 20, a first insulation component 30 and a second insulation component 40. The shell 10 includes a first wall 11, the first wall 11 is formed with a through hole 110; the pole 20 is arranged through the through hole 110. The first insulation component 30 insulates and separates the first wall 11 and the pole 20. The second insulation component 40 is connected with the first insulation component 30. The second insulation component 40 insulates and separates the first wall 11 and the pole 20. Wherein, the first insulation component 30 is arranged around the periphery of the second insulation component 40. The melting point of the second insulation component 40 is higher than the melting point of the first insulation component 30.

[0101] Specifically, the case 10 is a structure forming an outer contour of the battery cell 100, and an inside of the case 10 can be used to accommodate various components of the battery cell 100, such as the electrode assembly 50.

[0102] The electrode assembly 50 is a component in which electrochemical reactions occur in the battery cell 100. One or more electrode assemblies 50 can be included in the case 10 of the battery cell 100. The electrode assembly 50 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet each have a portion of an active material constituting an electrode structure of the electrode assembly 50, and each have a portion not having the active material constituting a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the electrode structure or can be located at both ends of the electrode structure, respectively. In the charging and discharging process of the battery, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tabs are connected to the terminal post 20 to form a current loop.

[0103] The battery cell 100 further includes a third insulating component 60. The third insulating component 60 can be disposed between the first wall 11 and the electrode assembly 50. The third insulating component 60 can insulate and isolate the electrode assembly 50 and the first wall 11. The third insulating component 60 is a component made of an insulating material. For example, the third insulating component 60 can be made of a plastic material.

[0104] The tab and the terminal post 20 can be connected through a jumper 70. One end of the jumper 70 is connected to the terminal post 20, and the other end of the jumper 70 is connected to the electrode assembly 50, so that current can be transmitted between the electrode assembly 50 and the terminal post 20.

[0105] The case 10 can include a plurality of walls having a certain thickness. The first wall 11 is any wall of the case, which can be a top wall, a bottom wall, or a side wall. The via hole 110 can be a through hole that penetrates the first wall 11 in the thickness direction of the first wall 11. The via hole 110 can have a regular shape such as a circular shape, an elliptical shape, or an irregular shape. The via hole 110 can be provided corresponding to the terminal post 20 to facilitate connection of the terminal post 20 with an external cable.

[0106] The terminal post 20 is used to be electrically connected with the electrode assembly 50 to output or input the electric energy of the battery cell 100. The terminal post 20 can be made of copper, aluminum, or other conductive materials. The terminal post 20 can include a positive terminal post 20 and a negative terminal post 20. The positive terminal post 20 and the negative terminal post 20 can be spaced apart and disposed on the end cover plate.

[0107] The terminal post 20 and the via hole 110 can be insulated and isolated. For example, the terminal post 20 and the hole wall of the via hole 110 can have a gap therebetween. For another example, an outer surface of the terminal post 20 can be coated with an insulating adhesive that can be in contact with the hole wall of the via hole 110.

[0108] The first insulation component 30 is a component made of an insulating material. For example, the first insulation component 30 can be made of a plastic material. The first insulation component 30 can separate the first wall 11 and the pole 20, thereby blocking the current between the first wall 11 and the pole 20. For example, the first insulation component 30 can be sleeved on the pole 20. The first insulation component 30 can have a larger projected area than the second insulation component 40. At a normal working temperature, the first insulation component 30 can insulate and separate the first wall 11 and the pole 20 in a larger range.

[0109] The second insulation component 40 is a component made of an insulating material. The second insulation component 40 can be connected to the first insulation component 30 in a clamping manner or an adhesive manner. The second insulation component 40 can separate the first wall 11 and the pole 20, thereby blocking the current between the first wall 11 and the pole 20. For example, the second insulation component 40 can be sleeved on the pole 20. At an extremely high temperature, the first insulation component 30 can melt, and the first wall 11 and the pole 20 can be short-circuited. By arranging the second insulation component 40, the first wall 11 and the pole 20 can still be separated by the second insulation component 40, thereby reducing the probability of short-circuiting between the first wall 11 and the pole 20.

[0110] In the battery monomer 100 in the embodiment of the utility model, because the melting point of the second insulation component 40 is higher than the melting point of the first insulation component 30, even if the first insulation component 30 melts at an extremely high temperature, the first wall 11 and the pole 20 of the shell 10 can still be insulated and separated by the second insulation component 40, thereby reducing the probability of short-circuiting between the pole 20 and the shell 10, and further reducing the probability of short-circuiting and fire of the battery monomer 100.

[0111] In addition, at a normal working temperature, the first insulation component 30 and the second insulation component 40 jointly provide double insulation protection between the pole 20 and the shell 10. This double protection mechanism effectively reduces the possibility of short-circuiting between the pole 20 and the shell 10, thereby reducing the risk of fire caused by short-circuiting of the battery monomer 100. Moreover, because the first insulation component 30 is arranged around the periphery of the second insulation component 40, the first insulation component 30 can protect the second insulation component 40, thereby preventing the second insulation component 40 from being interfered by external environmental factors during use, thereby prolonging the service life of the second insulation component 40.

[0112] Please refer to Figure 3 and Figure 7In some embodiments, the battery cell 100 further includes a limiting member 80. The limiting member 80 is connected with the pole 20, and the limiting member 80 is arranged on one side of the thickness direction of the first wall 11. A part of the first insulating member 30 is arranged between the first wall 11 and the limiting member 80, and another part of the first insulating member 30 is arranged between the first wall 11 and the pole 20 and extends into the via hole 110. The second insulating member 40 is arranged between the first wall 11 and the limiting member 80.

[0113] Specifically, the limiting member 80 can be a member for limiting the position of the pole 20. The limiting member 80 can have a shape of a block. For example, the limiting member 80 can be a riveting block, a connecting block with a threaded hole, or the like. The limiting member 80 can be made of a metal material. The limiting member 80 and the pole 20 can be connected by riveting, welding, or the like. The limiting member 80 and the pole 20 can have a current therebetween, or in other words, the current can flow between the limiting member 80 and the pole 20.

[0114] The limiting member 80 can be sleeved on the pole 20. The limiting member 80 can be spaced apart from the first wall 11. A part of the first insulating member 30 can be arranged in the region between the limiting member 80 and the first wall 11 to separate the limiting member 80 and the first wall 11. The pole 20 can be spaced apart from the first wall 11. Another part of the insulating member can be arranged in the region between the pole 20 and the first wall 11 to separate the pole 20 and the first wall 11.

[0115] In the thickness direction of the first wall 11, the limiting member 80, the first insulating member 30, and the first wall 11 can be sequentially stacked. In the thickness direction of the first wall 11, the limiting member 80, the second insulating member 40, and the first wall 11 can be sequentially stacked. The first insulating member 30 and the second insulating member 40 can be located in the same layer.

[0116] In this way, the limiting member 80 can be used to limit and fix the position of the pole 20, thereby reducing the probability of displacement of the pole 20 during use. The first insulating member 30 can separate the first wall 11 and the limiting member 80 in the thickness direction, thereby blocking the current between the limiting member 80 and the first wall 11. The first insulating member 30 can also separate the first wall 11 and the pole 20, thereby blocking the current between the pole 20 and the first wall 11. The second insulating member 40 can separate the limiting member 80 and the first wall 11 in the thickness direction, thereby blocking the current between the limiting member 80 and the first wall 11.

[0117] Therefore, the first and second insulation components 30 and 40 can insulate and isolate the limiting component 80 and the first wall 11, and the first insulation component 30 can insulate and isolate the pole 20 and the first wall 11, thereby reducing the probability of short circuit between the pole 20 and the shell 10, and further reducing the probability of short circuit and fire of the battery cell 100.

[0118] Please refer to Figure 3 and Figure 7 In some embodiments, the first insulation component 30 is provided with a first mounting groove 31. The first mounting groove 31 penetrates the first insulation component 30 along the thickness direction of the first insulation component 30. The second insulation component 40 is arranged in the first mounting groove 31, and the second insulation component 40 is supported between the two side surfaces of the first wall 11 and the limiting component 80.

[0119] Specifically, the first mounting groove 31 can be a straight groove, or a groove with a specific shape, such as L-shaped, U-shaped or other complex shapes. The shape of the second insulation component 40 can match the first mounting groove 31. For example, the size of the second insulation component 40 is equal to or approximately equal to the size of the first mounting groove 31, so that the second insulation component 40 can be arranged in the first mounting groove 31. The second insulation component 40 can be entirely accommodated in the first mounting groove 31. The second insulation component 40 can also be partially accommodated in the first mounting groove 31.

[0120] The limiting component 80 and the first wall 11 can be arranged on the two sides of the two grooves of the first mounting groove 31, respectively. The side surface of the limiting component 80 close to the second insulation component 40 can be in contact with the second insulation component 40. The side surface of the first wall 11 close to the second insulation component 40 can be in contact with the second insulation component 40.

[0121] In this way, the first mounting groove 31 can serve as a void area to facilitate the installation of the second insulation component 40. In addition, the second insulation component 40 can separate the two side surfaces of the first wall 11 and the limiting component 80 arranged adjacent to each other in the case of melting of the first insulation component 30, thereby maintaining the insulation and isolation between the first wall 11 and the limiting component 80, thereby reducing the probability of short circuit between the limiting component 80 and the first wall 11, and further reducing the probability of short circuit and fire of the battery cell 100.

[0122] Please refer to Figure 3 and Figure 7 In some embodiments, the first wall 11 is provided with a second mounting groove 111. The second mounting groove 111 is arranged corresponding to the first mounting groove 31. The second insulation component 40 is arranged in the first mounting groove 31 and the second mounting groove 111.

[0123] Specifically, the second installation slot 111 is a slot for fixing the second insulating member 40. The number of the second installation slot 111 can be one or more. For example, the number of the second installation slot 111 is two, and the two second installation slots 111 are arranged on the first wall 11 at intervals. The second installation slot 111 can be equal to or larger than the length and width of the first installation slot 31.

[0124] In this way, through the second installation slot 111, the second insulating member 40 can be more easily placed and fixed at a predetermined position without the need for additional adjustment or alignment steps, thereby simplifying the installation process and reducing the possibility of displacement of the second insulating member 40 during use.

[0125] Please refer to Figure 3 and Figure 8 , Figure 8 is a partial structure explosion schematic diagram of a battery monomer 100 provided by some embodiments of the present application. In some embodiments, the first installation slot 31 is annular in shape. The second insulating member 40 is annular in shape.

[0126] In this way, the annular structure can provide a continuous and continuous insulation path, which helps to improve the insulation performance of the battery monomer 100. In a high-temperature environment, the annular structure can more effectively maintain the insulation isolation between the limiting member 80 and the first wall 11, thereby reducing the probability of short circuit between the limiting member 80 and the first wall 11, thereby reducing the probability of short circuit between the pole 20 and the shell 10, and further reducing the probability of short circuit and fire of the battery monomer 100.

[0127] In addition, since the annular structure usually only needs to be positioned once, the installation process of the annular structure is simple.

[0128] Please refer to Figure 3 , Figure 9 , Figure 10 , Figure 11 , Figure 9 is a partial structure explosion schematic diagram of a battery monomer 100 provided by some embodiments of the present application, Figure 10 is a partial structure explosion schematic diagram of a battery monomer 100 provided by some embodiments of the present application, Figure 11 is a partial structure explosion schematic diagram of a battery monomer 100 provided by some embodiments of the present application. In some embodiments, the number of the first installation slot 31 and the second insulating member 40 is multiple and one-to-one correspondence, and the first installation slot 31 and the second insulating member 40 are arranged at intervals along the circumference of the first insulating member 30.

[0129] Specifically, the number of the first mounting groove 31 and the second insulating part 40 can be two, three, four or even more. The first insulating part 30 can be integrally injection molded, thereby reducing the positioning difficulty in the assembly process.

[0130] Referring to Figure 9 , as an example, the number of the first mounting groove 31 and the second insulating part 40 is two. The shape of the first mounting groove 31 and the second mounting groove 111 is arc-shaped. The first mounting groove 31 and the second insulating part 40 can be symmetrically arranged about the central axis of the first insulating part 30.

[0131] Referring to Figure 10 , as an example, the number of the first mounting groove 31 and the second insulating part 40 is two. The shape of the first mounting groove 31 and the second mounting groove 111 is rectangular. The first mounting groove 31 and the second insulating part 40 can be symmetrically arranged about the central axis of the first insulating part 30.

[0132] Referring to Figure 11 , as an example, the number of the first mounting groove 31 and the second insulating part 40 is two. The shape of the first mounting groove 31 and the second mounting groove 111 is cylindrical. The first mounting groove 31 and the second insulating part 40 can be symmetrically arranged about the center of the first insulating part 30.

[0133] In this way, the second insulating part 40 can provide an insulating function in multiple areas of the circumference of the first insulating part 30, thereby more effectively maintaining the insulating isolation between the limiting part 80 and the first wall 11, thereby reducing the probability of short circuit between the limiting part 80 and the first wall 11, thereby reducing the probability of short circuit between the pole 20 and the shell 10, and further reducing the probability of short circuit and fire of the battery monomer 100.

[0134] In addition, when replacement or maintenance is required, the design of the plurality of second insulating parts 40 allows the damaged second insulating part 40 to be replaced individually without replacing the entire second insulating part 40, thereby reducing maintenance cost and complexity.

[0135] Referring to Figure 3 and Figure 7 , in some embodiments, the first insulating part 30 includes a first part 32 and a second part 33, the second part 33 is connected to the edge of the first part 32 and protrudes from one side of the first part 32, the first part 32 is supported between the two side surfaces of the first wall 11 and the limiting part 80, and the second part 33 is supported between the two side surfaces of the first wall 11 and the pole 20.

[0136] Thus, the first portion 32 can separate the first wall 11 and the limiting member 80, and the second portion 33 can separate the first wall 11 and the pole 20. Therefore, the first insulation member 30 can not only maintain the insulation separation between the first wall 11 and the limiting member 80, but also maintain the insulation separation between the first wall 11 and the pole 20.

[0137] Please refer to Figure 3 and Figure 7 In some embodiments, a portion of the first insulation member 30 is supported between two side surfaces of the first wall 11 and the limiting member 80. The second insulation member 40 is supported between two side surfaces of the first wall 11 and the limiting member 80. There is a gap 101 between the first wall 11 and the pole 20. The battery cell 100 further comprises a sealing member 90. The sealing member 90 is arranged at the gap 101 and supported between two side surfaces of the first wall 11 and the pole 20.

[0138] Specifically, the gap 101 refers to the space between the first wall 11 and the pole 20, which needs to be sealed to prevent the invasion of contaminants and the leakage of electrolyte. The sealing member 90 can seal the gap 101 between the first wall 11 and the pole 20. The sealing member 90 can be a structure such as a sealing ring, a sealing gasket, etc. The number of sealing members 90 can be one or more. For example, the number of sealing members 90 can be two, three, four, or even more. The sealing member 90 can be made of an elastomeric material, such as rubber, silicone rubber, etc.

[0139] The sealing member 90 can be arranged at the gap 101 by compression, adhesion, etc. After assembly, the first wall 11 can press the sealing member 90, so that the sealing member 90 remains in a compressed state, thereby obtaining a better sealing effect.

[0140] Thus, at normal operating temperature, the limiting member 80 can exert a force on the first insulation member 30, thereby exerting a force on the first wall 11, and further exerting a force on the sealing member 90 between the first wall 11 and the pole 20. After the first insulation member 30 melts under high temperature, the limiting member 80 can exert a force on the second insulation member 40, thereby exerting a force on the first wall 11, and further exerting a force on the sealing member 90 between the first wall 11 and the pole 20. Therefore, the second insulation member 40 can maintain the compression amount of the sealing member 90 after the first insulation member 30 melts under heat, thereby maintaining the sealing performance of the battery cell 100.

[0141] In addition, the sealing component 90 can seal the gap 101 between the first wall 11 and the pole 20, so as to reduce the probability of liquid, dust or other contaminants entering the inside of the battery monomer 100, and reduce the probability of electrolyte leakage in the battery monomer 100, thereby improving the sealing performance of the battery monomer 100. In addition, since the sealing component 90 is supported between the two side surfaces adjacent to the first wall 11 and the pole 20, the sealing component 90 can also provide an insulating isolation function.

[0142] Please refer to Figure 3 and Figure 7 In some embodiments, the pole 20 includes a third part 21 and a fourth part 22, the third part 21 protrudes from one side of the fourth part 22, the third part 21 penetrates the via hole 110, the third part 21 is connected with the limiting component 80, and the first gap 1010 is formed between the third part 21 and the first wall 11. The second gap 1011 is formed between the fourth part 22 and the first wall 11, the gap 101 includes the first gap 1010 and the second gap 1011, and the sealing component 90 is arranged at the first gap 1010 and the second gap 1011.

[0143] Specifically, the third part 21 can be used to connect with an external cable. The fourth part 22 can be used to connect with the adapter 70 or the tab. The third part 21 and the limiting component 80 can be connected by riveting, welding or the like. The first gap 1010 and the second gap 1011 can be in communication with each other. The sealing component 90 can extend from the first gap 1010 to the second gap 1011.

[0144] In this way, the sealing component 90 can seal the first gap 1010 and the second gap 1011 at the same time, so as to reduce the probability of liquid, dust or other contaminants entering the inside of the battery monomer 100, and reduce the probability of electrolyte leakage in the battery monomer 100, thereby improving the sealing performance of the battery monomer 100.

[0145] Please refer to Figure 3 and Figure 7 In some embodiments, the sealing component 90 includes a first sealing part 91 and a second sealing part 92 connected with the first sealing part 91 at an angle, the first sealing part 91 is arranged at the first gap 1010, and the first sealing part 91 is supported between the two side surfaces adjacent to the first wall 11 and the third part 21; the second sealing part 92 is arranged at the second gap 1011, and the second sealing part 92 is supported between the two side surfaces adjacent to the first wall 11 and the fourth part 22.

[0146] Specifically, the first sealing part 91 can provide sealing between the first wall 11 and the third portion 21 of the pole 20. The second sealing part 92 can provide sealing between the first wall 11 and the fourth portion 22 of the pole 20. The angle between the first sealing part 91 and the second sealing part 92 refers to the angle between the two side faces where the first sealing part 91 and the second sealing part 92 are adjacently arranged. This angle can be arbitrarily set according to requirements, for example, the angle can be an acute angle, a right angle, or an obtuse angle.

[0147] In this way, the first sealing part 91 is arranged at the first gap 1010, and the second sealing part 92 is arranged at the second gap 1011, so that the sealing part 90 can seal the first gap 1010 and the second gap 1011 at the same time, thereby reducing the probability of liquid, dust, or other contaminants entering the inside of the battery monomer 100, and reducing the probability of electrolyte leakage in the battery monomer 100, thereby improving the sealing performance of the battery monomer 100. Moreover, since the first sealing part 91 and the second sealing part 92 are connected at an angle, the installation and replacement steps of the sealing part are simple, which helps to reduce the assembly time.

[0148] In addition, since the first sealing part 91 is supported between the two side faces where the first wall 11 and the third portion 21 are adjacently arranged, and the second sealing part 92 is supported between the two side faces where the first wall 11 and the fourth portion 22 are adjacently arranged, the sealing part 90 can not only maintain the insulation isolation between the first wall 11 and the third portion 21, but also maintain the insulation isolation between the first wall 11 and the fourth portion 22.

[0149] Please refer to Figure 4 , Figure 12 , Figure 13 , Figure 14 and Figure 15 , Figure 12 is a partial structure explosion schematic diagram of a battery monomer 100 provided by some embodiments of the present application, Figure 13 is a partial structure explosion schematic diagram of a battery monomer 100 provided by some embodiments of the present application, Figure 14 is a partial structure schematic diagram of a battery monomer 100 provided by some embodiments of the present application, Figure 15 is Figure 14 a B-B direction sectional view of the battery monomer 100 of

[0150] Specifically, the limiting component 80 can be a welded piece, a riveted piece. For example, the limiting component 80 can be a welded ring. The limiting component 80 can be connected to the first wall 11 by welding, riveting, or the like. The limiting component 80 can be used to limit the position of the pole 20.

[0151] The third mounting groove 23 is a groove on the pole 20 for arranging the second insulating component 40. The number of the third mounting groove 23 can be one or more. For example, the number of the third mounting groove 23 is four, and the four third mounting grooves 23 can be arranged at intervals along the circumference of the pole 20.

[0152] The first insulating component 30 can be manufactured by an injection molding process. The first insulating component 30 can wrap part of the limiting component 80, or in other words, the limiting component 80 can extend into the first insulating component 30.

[0153] In the thickness direction of the first wall 11, the limiting component 80, the at least partial insulating component, and the second insulating component 40 can be arranged in layers.

[0154] In this way, through the third mounting groove 23, the second insulating component 40 can be more easily placed and fixed in the predetermined position without the need for additional adjustment or alignment steps, thereby simplifying the installation process and reducing the possibility of displacement of the second insulating component 40 during use.

[0155] In addition, the first insulating component 30 can separate the limiting component 80 and the second insulating component 40, and the second insulating component 40 and the at least partial first insulating component 30 can separate the pole 20 and the limiting component 80, so the first insulating component 30 can block the current between the limiting component 80 and the second insulating component 40, and block the current between the pole 20 and the limiting component 80. The second insulating component 40 can block the current between the pole 20 and the limiting component 80. Therefore, even if the first insulating component 30 melts under extremely high temperature conditions, the limiting component 80 and the pole 20 can still be insulated from each other by the second insulating component 40, thereby reducing the probability of short circuit between the pole 20 and the shell 10, and further reducing the probability of fire caused by short circuit of the battery monomer 100.

[0156] In some embodiments, the pole 20 includes a third portion 21 and a fourth portion 22, the third portion 21 protrudes from one side of the fourth portion 22, the fourth portion 22 surrounds the periphery of the third portion 21, and the fourth portion 22 is formed with the third mounting groove 23.

[0157] Specifically, the third portion 21 can be cylindrical. The fourth portion 22 can be a flange surrounding the periphery of the cylindrical structure.

[0158] Thus, since the fourth portion 22 is arranged around the periphery of the third portion 21, the fourth portion 22 is more likely to contact the limiting member 80 after the first insulating member 30 melts. Therefore, the third mounting groove 23 is arranged on the fourth portion 22, which can reduce the probability of the limiting member 80 short-circuiting with the pole 20, thereby reducing the probability of the pole 20 and the shell 10 short-circuiting, and further reducing the probability of the battery monomer 100 short-circuiting and catching fire.

[0159] In some embodiments, the limiting member 80 comprises a body portion 81 connected with the first wall 11 and an extension portion 82 extending towards the pole 20, the extension portion 82 is arranged opposite to the fourth portion 22, at least part of the first insulating member 30 is arranged between the extension portion 82 and the second insulating member 40, and the second insulating member 40 and at least part of the first insulating member 30 are both arranged between the fourth portion 22 and the extension portion 82.

[0160] Specifically, the body portion 81 is the portion of the limiting member 80 connected with the first wall 11. The body portion 81 can be used to support the overall structure of the limiting member 80. The body portion 81 can be connected with the first wall 11 by welding, riveting, or the like.

[0161] The extension portion 82 can be connected to the edge of the body portion 81. The extension portion 82 can extend from the edge of the body portion 81 to one side of the thickness direction of the fourth portion 22.

[0162] Thus, the second insulating member 40 and at least part of the first insulating member 30 can separate the fourth portion 22 and the extension portion 82, thereby blocking the current between the fourth portion 22 and the extension portion 82. The first insulating member 30 can separate the extension portion 82 and the second insulating member 40, thereby blocking the current between the extension portion 82 and the second insulating member 40. In this way, even if the first insulating member 30 melts under high temperature, the second insulating member 40 can still separate the extension portion 82 and the fourth portion 22, thereby insulating and isolating the pole 20 and the limiting member 80, thereby reducing the probability of the shell 10 and the pole 20 short-circuiting, and further reducing the probability of the battery monomer 100 short-circuiting and catching fire.

[0163] In some embodiments, at least part of the first insulating member 30 is supported between two side surfaces of the third portion 21 and the extension portion 82 arranged adjacent to each other.

[0164] Thus, the support of the first insulating member 30 between the third portion 21 and the extension portion 82 helps to maintain the insulation and isolation between these two components, thereby reducing the probability of the shell 10 and the pole 20 short-circuiting, and further reducing the probability of the battery monomer 100 short-circuiting and catching fire.

[0165] In some embodiments, the second insulating component 40 comprises a main body 41, and the main body 41 is provided with a groove 42 recessed in the main body 41 in a direction away from the first insulating component 30.

[0166] Specifically, the main body 41 is arranged in the third mounting groove 23. The groove 42 can pass through the main body 41 in the length or width direction of the main body 41. The number of grooves 42 can be one or more. The length of the groove 42 can be less than the length of the main body 41.

[0167] In this way, when the first insulating component 30 is formed by an injection molding process, the groove 42 arranged on the main body 41 facilitates the flow of plastic during the injection molding of the first insulating component 30, reducing the probability of local material collapse of the first insulating component 30.

[0168] In some embodiments, the melting point of the second insulating component 40 is greater than or equal to 260°C.

[0169] Specifically, the melting point of the second insulating component 40 can be 260°C, 300°C, 400°C, 500°C, 1000°C, 2000°C, 3000°C or even higher.

[0170] It should be noted that the values listed here are examples and cannot be used as a limitation on the embodiments of the utility model.

[0171] In this way, within this range of melting point temperatures, the second insulating component 40 is less likely to melt when the battery monomer 100 is in a high-temperature environment, thereby reducing the probability of short-circuiting between the shell 10 and the pole 20, and further reducing the probability of short-circuiting and fire of the battery monomer 100.

[0172] In some embodiments, the second insulating component 40 is made of one of ceramic, polyimide or liquid crystal polymer.

[0173] Specifically, the melting point of the second insulating component 40 made of ceramic, polyimide or liquid crystal polymer is higher than or equal to 260°C and has good insulating properties.

[0174] In this way, by using one of ceramic, polyimide or liquid crystal polymer to manufacture the second insulating component 40, the second insulating component 40 not only provides good heat resistance, but also provides good insulating properties, thereby reducing the probability of short-circuiting between the shell 10 and the pole 20, and further reducing the probability of short-circuiting and fire of the battery monomer 100.

[0175] In some embodiments, the first wall 11 is a cover of the shell 10. The shell 10 can have an opening structure. The first wall 11 can serve as a cover of the shell 10 to open or close the shell 10.

[0176] Please refer to Figure 3 and Figure 7 In one specific embodiment, the battery cell 100 of the present application comprises a housing 10, a pole 20, a first insulating component 30 and a second insulating component 40. The housing 10 comprises a first wall 11, the first wall 11 is formed with a through hole 110, and the pole 20 is arranged in the through hole 110. The second insulating component 40 is connected with the first insulating component 30. The first insulating component 30 surrounds the periphery of the second insulating component 40. The melting point of the second insulating component 40 is higher than that of the first insulating component 30. The melting point of the second insulating component 40 is 3000℃. The second insulating component 40 is made of ceramic material.

[0177] The battery cell 100 further comprises a limiting component 80. The limiting component 80 is riveted with the pole 20, and the limiting component 80 is arranged on one side of the thickness direction of the first wall 11. A part of the first insulating component 30 is arranged between the first wall 11 and the limiting component 80, and another part of the first insulating component 30 is arranged between the first wall 11 and the pole 20 and extends into the through hole 110. The second insulating component 40 is arranged between the first wall 11 and the limiting component 80.

[0178] The first insulating component 30 is provided with a first mounting groove 31. The first mounting groove 31 penetrates the first insulating component 30 along the thickness direction of the first insulating component 30. The second insulating component 40 is arranged in the first mounting groove 31, and the second insulating component 40 is supported between the two side surfaces of the first wall 11 and the limiting component 80 arranged adjacently. The first insulating component 30 comprises a first part 32 and a second part 33, the second part 33 is connected to the edge of the first part 32 and protrudes on one side of the first part 32, the first part 32 is supported between the two side surfaces of the first wall 11 and the limiting component 80 arranged adjacently, and the second part 33 is supported between the two side surfaces of the first wall 11 and the pole 20 arranged adjacently.

[0179] A part of the first insulating component 30 is supported between the two side surfaces of the first wall 11 and the limiting component 80 arranged adjacently. The second insulating component 40 is supported between the two side surfaces of the first wall 11 and the limiting component 80 arranged adjacently. There is a gap 101 between the first wall 11 and the pole 20. The pole 20 comprises a third part 21 and a fourth part 22, the third part 21 protrudes on one side of the fourth part 22, the third part 21 is arranged in the through hole 110, the third part 21 is connected with the limiting component 80, a first gap 1010 is formed between the third part 21 and the first wall 11, a second gap 1011 is formed between the fourth part 22 and the first wall 11, the gap 101 comprises the first gap 1010 and the second gap 1011, and the sealing component 90 is arranged at the first gap 1010 and the second gap 1011.

[0180] The battery cell 100 further comprises a sealing component 90. The sealing component 90 comprises a first sealing part 91 and a second sealing part 92 connected to the first sealing part 91 at an angle, the first sealing part 91 is arranged at the first gap 1010 and supported between two side surfaces of the first wall 11 and the third part 21 arranged adjacently, and the second sealing part 92 is arranged at the second gap 1011 and supported between two side surfaces of the first wall 11 and the fourth part 22 arranged adjacently.

[0181] The first wall 11 is provided with a second mounting groove 111. The second mounting groove 111 is arranged corresponding to the first mounting groove 31. The second insulating component 40 is arranged in the first mounting groove 31 and the second mounting groove 111. The first mounting groove 31 is annular in shape. The second insulating component 40 is annular in shape.

[0182] Please refer to Figure 4 and Figure 15 In another specific embodiment, the battery cell 100 of the embodiment of the present application comprises a housing 10, a pole 20, a first insulating component 30 and a second insulating component 40. The housing 10 comprises a first wall 11, the first wall 11 is formed with a through hole 110, and the pole 20 is arranged through the through hole 110. The second insulating component 40 is connected to the first insulating component 30. Among them, the first insulating component 30 surrounds the periphery of the second insulating component 40. The melting point of the second insulating component 40 is higher than the melting point of the first insulating component 30.

[0183] The pole 20 comprises a third part 21 and a fourth part 22, the third part 21 is protruded on one side of the fourth part 22, the fourth part 22 surrounds the periphery of the third part 21, and the fourth part 22 is formed with a third mounting groove 23.

[0184] The battery cell 100 further comprises a limiting component 80. The limiting component 80 comprises a body part 81 and an extension part 82 extending towards the pole 20, the body part 81 is welded to the first wall 11, the extension part 82 is arranged opposite to the fourth part 22, at least part of the first insulating component 30 is arranged between the extension part 82 and the second insulating component 40, and the second insulating component 40 and at least part of the first insulating component 30 are arranged between the fourth part 22 and the extension part 82.

[0185] At least part of the limiting component 80 is arranged on one side of the thickness direction of the first wall 11, the pole 20 is provided with the third mounting groove 23, the second insulating component 40 is arranged in the third mounting groove 23, at least part of the first insulating component 30 is arranged between the limiting component 80 and the second insulating component 40, and the second insulating component 40 and at least part of the first insulating component 30 are arranged between the pole 20 and the limiting component 80.

[0186] The second insulating member 40 has a melting point of 3000°C. The second insulating member 40 is made of a ceramic material. The second insulating member 40 includes a main body portion 41 provided with a recess 42 recessed in the main body portion 41 in a direction away from the first insulating member 30.

[0187] The battery device 200 of the present embodiment includes a plurality of the battery cell 100 according to any one of the above embodiments.

[0188] Since the battery device 200 includes the above-described battery cell 100, the battery device 200 includes at least all the advantageous effects of the above-described battery cell 100, which will not be described here.

[0189] The power consuming device 1000 of the present embodiment includes the battery cell 100 according to any one of the above embodiments or the battery device 200 described in the above embodiment.

[0190] Since the power consuming device 1000 includes the above-described battery cell 100 or battery device 200, the power consuming device 1000 includes at least all the advantageous effects of the above-described battery cell 100 or battery device 200, which will not be described here.

[0191] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized by, The battery cell comprises: a housing comprising a first wall formed with a through hole; a pole column passing through the through hole; a first insulation component insulating the first wall and the pole column; a second insulation component connected with the first insulation component, the second insulation component insulating the first wall and the pole column; wherein the first insulation component surrounds the periphery of the second insulation component, and the melting point of the second insulation component is higher than that of the first insulation component.

2. The battery cell of claim 1, wherein, The battery cell further comprises a limiting component connected with the pole column, the limiting component being arranged on one side of the thickness direction of the first wall; a part of the first insulation component is arranged between the first wall and the limiting component, and another part of the first insulation component extends into the through hole and is arranged between the first wall and the pole column; and the second insulation component is arranged between the first wall and the limiting component.

3. The battery cell of claim 2, wherein, The first insulation component is provided with a first mounting groove penetrating the first insulation component along the thickness direction of the first insulation component, the second insulation component is arranged in the first mounting groove, and the second insulation component is supported between the two side surfaces of the first wall and the limiting component arranged adjacently.

4. The battery cell of claim 3, wherein, The first wall is provided with a second mounting groove corresponding to the first mounting groove, and the second insulation component is arranged in the first mounting groove and the second mounting groove.

5. The battery cell of claim 3, wherein, The first mounting groove is annular in shape, and the second insulation component is annular in shape.

6. The battery cell of claim 3, wherein, The number of the first mounting grooves and the second insulation components is plural and arranged one by one in correspondence, and the first mounting grooves and the second insulation components are arranged at intervals along the circumferential direction of the first insulation component.

7. The battery cell of claim 2, wherein, The first insulation component comprises a first part and a second part, the second part is connected to the edge of the first part and protrudes from one side of the first part, the first part is supported between the two side surfaces of the first wall and the limiting component arranged adjacently, and the second part is supported between the two side surfaces of the first wall and the pole column arranged adjacently.

8. The battery cell of claim 2, wherein, A part of the first insulation component is supported between the two side surfaces of the first wall and the limiting component arranged adjacently, the second insulation component is supported between the two side surfaces of the first wall and the limiting component arranged adjacently, there is a gap between the first wall and the pole column, and the battery cell further comprises a sealing component arranged at the gap and supported between the two side surfaces of the first wall and the pole column arranged adjacently.

9. The battery cell of claim 8, wherein, The pole column comprises a third part and a fourth part, the third part protrudes from one side of the fourth part, the third part passes through the through hole, the third part is connected with the limiting component, a first gap is formed between the third part and the first wall, a second gap is formed between the fourth part and the first wall, the gap comprises the first gap and the second gap, and the sealing component is arranged at the first gap and the second gap.

10. The battery cell of claim 9, wherein, The sealing component includes a first sealing part and a second sealing part connected to the first sealing part at an angle, the first sealing part is arranged at the first gap, and the first sealing part is supported between two side surfaces of the first wall and the third part arranged adjacently; the second sealing part is arranged at the second gap, and the second sealing part is supported between two side surfaces of the first wall and the fourth part arranged adjacently.

11. The battery cell of claim 1, wherein, The battery cell further includes a limiting component connected to the first wall, at least part of the limiting component is arranged on one side of the first wall in the thickness direction, the pole column is provided with a third mounting groove, the second insulating component is arranged in the third mounting groove, at least part of the first insulating component is arranged between the limiting component and the second insulating component, and the second insulating component and at least part of the first insulating component are arranged between the pole column and the limiting component.

12. The battery cell of claim 11, wherein, The pole column includes a third part and a fourth part, the third part protrudes on one side of the fourth part, the fourth part surrounds the periphery of the third part, and the fourth part is formed with the third mounting groove.

13. The battery cell of claim 12, wherein, The limiting component includes a body part and an extension part extending towards the pole column, the body part is connected to the first wall, and the extension part is arranged opposite to the fourth part, at least part of the first insulating component is arranged between the extension part and the second insulating component, and the second insulating component and at least part of the first insulating component are arranged between the fourth part and the extension part.

14. The battery cell of claim 13, wherein, At least part of the first insulating component is supported between two side surfaces of the third part and the extension part arranged adjacently.

15. The battery cell of claim 11, wherein, The second insulating component includes a main body part, and the main body part is provided with a groove recessed in the main body part in a direction away from the first insulating component.

16. The battery cell of claim 1, wherein, The melting point of the second insulating component is greater than or equal to 260°C.

17. The battery cell of claim 16, wherein, The second insulating component is made of one of ceramic, polyimide, or liquid crystal polymer.

18. The battery cell of claim 1, wherein, The first wall is a cover of the shell.

19. A battery device characterized by comprising: A plurality of battery cells according to any one of claims 1-18.

20. An electrical device, comprising: A battery device according to claim 19.

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