CN219873676U - Battery cell, battery and electricity utilization device - Google Patents

Abstract

This application discloses battery cells, batteries and electrical devices. Wherein, the battery cell includes: a casing, including a wall, and the wall is provided with a mounting hole connecting the inside and outside of the casing; a sampling component is accommodated inside the casing; a plurality of insulating connection parts are arranged in the mounting hole and sealed Plug the installation holes, and multiple connecting parts are electrically connected to the sampling component. Through the above method, the number of openings on the outer casing of the battery cell can be reduced to improve its strength, reduce the risk of structural strength failure, simplify the process and save costs; further, it can also reduce the space occupied by the openings. Improve the compactness of the structure.

Description

Battery cells, batteries and electrical devices

Technical field

This application relates to the field of battery technology, and in particular to battery cells, batteries and electrical devices.

Background technique

With the development of battery technology, battery cells are used in more and more fields and gradually replace traditional petrochemical energy in the field of automotive power. Battery cells can store chemical energy and controllably convert chemical energy into electrical energy. In recyclable battery cells, the active materials can be activated by charging after discharge and continue to be used.

Generally, a battery cell includes a casing and an electrode assembly, a sampling assembly, etc. housed in the casing. The electrode assembly is electrically connected to the outside world through the electrode column, and the sampling assembly is electrically connected to the outside world through the connecting column. In the existing battery cell structure, the sampling component usually includes one or more connecting posts, and when the number of sampling components is multiple, the number of connecting posts also increases. In order to facilitate the installation of the connecting posts, a plurality of mounting holes are usually opened on the housing, so that the connecting posts are installed at the plurality of mounting holes correspondingly to achieve electrical connection between the connecting posts and the outside world. However, this structure will increase the risk of structural strength failure of the battery cells.

Utility model content

In view of the above problems, this application provides battery cells, batteries and electrical devices, which can reduce the number of openings on the shell of the battery cell to improve its strength, reduce the risk of structural strength failure, simplify the process and save costs. ; Furthermore, it can also reduce the space occupied by the opening and improve the compactness of the structure.

In a first aspect, the application provides a battery cell. The battery cell at least includes: a casing including a wall portion with a mounting hole connecting the inside and outside of the casing; a sampling component housed inside the casing; and an insulating connection. A plurality of connection parts are arranged in the installation hole and block the installation hole. The plurality of connection parts are electrically connected to the sampling component.

Through the above method, multiple connecting parts for insulating connections that block the mounting hole can be installed through the same mounting hole on the shell. That is, multiple connecting parts for insulating connection can be installed through one mounting hole, which can reduce the installation time on the shell. Number of holes. On the one hand, since the strength of the casing will decrease as the number of mounting holes increases, the above structure can increase the strength of the casing and reduce the risk of structural strength failure of the battery cells; on the other hand, the sealing performance of the casing will also decrease with the increase in the number of mounting holes. decreases with the increase in the number of mounting holes, so the above structure can also improve the sealing performance of the shell; on the other hand, because the connecting column corresponding to each mounting hole needs to be installed at the corresponding mounting hole, that is, it needs to be fixedly connected to the shell. As the number of mounting holes increases, the complexity of the battery cell process will also increase. For example, it is necessary to process a step surface for each mounting hole on the casing, which is costly. Therefore, the above structure can also reduce the process of the battery cell. complexity and cost savings. Furthermore, integrating multiple connecting parts of the insulation connection into the same mounting hole can reduce the area occupied by the mounting holes on the housing compared to providing independent mounting holes without connecting parts, thereby improving the compactness of the structure. sex.

In some embodiments, the plurality of connecting parts include a first connecting part disposed along a preset axis and a second connecting part surrounding at least part of the outer periphery of the first connecting part along a circumferential direction of the first connecting part. By arranging the first connection part along the preset axis, the area occupied by the multiple connection parts of the insulation connection on the wall can be reduced, thereby reducing the opening area of the mounting hole, thereby improving the strength and sealing performance of the wall; and By arranging the second connecting part around at least part of the outer periphery of the first connecting part, the arrangement area between the second connecting part and the first connecting part can be reduced, thereby further reducing the opening area of the mounting hole, and thereby further increasing the wall area. Strength and sealing performance; and can improve the compactness of the structure.

In some embodiments, the second connecting portion is closed around the periphery of the first connecting portion. By closing the second connecting part around the outer periphery of the first connecting part, and the second connecting part being sleeved on the outer periphery of the first connecting part, the area occupied by the second connecting part and the first connecting part on the wall can be further reduced, thereby The opening area of the mounting hole can be reduced, thereby improving the strength and sealing performance of the wall; and the compactness of the structure can be improved. And the size of the second connection part is increased to improve the electrical performance.

In some embodiments, the number of the second connecting parts is at least two, and the at least two second connecting parts are arranged at intervals along the circumferential direction of the first connecting part. Through the above method, at least three connecting parts can be realized, and the second connecting part is provided around at least part of the outer periphery of the first connecting part, which can reduce the arrangement area between the second connecting part and the first connecting part, so that it can further Reduce the opening area of the mounting hole, thereby further improving the strength and sealing performance of the wall, and improving the compactness of the structure.

In some embodiments, the connecting portion is partially disposed around the predetermined axis, and the plurality of connecting portions are spaced apart from each other along the circumferential direction of the predetermined axis. The connecting portion is partially arranged around the preset axis, and the plurality of connecting portions are spaced apart from each other along the circumferential direction of the preset axis, so that the multiple connecting portions can be located on the same outer periphery outside the preset axis, and the multiple connecting portions can be reduced on the wall. The occupied area can be reduced, thereby reducing the opening area of the mounting hole, improving the strength and sealing performance of the housing, and improving the compactness of the structure.

In some embodiments, the battery cell further includes an insulating member disposed between the plurality of connection parts. Insulators are provided between adjacent connecting parts to improve interference between multiple connecting parts, such as electrical signal interference, and to improve the reliability of the battery cells.

In some embodiments, the battery cell further includes a fixing part, the connecting part is fixed to the fixing part, and the fixing part fixes the connecting wall part. The connection between the connecting part and the wall part is realized through the fastener, which can improve the stability between the connecting part and the wall part, and can reduce problems such as damage to the connecting part during the installation process.

In some embodiments, the fixing member is at least partially circumferentially fixed to the outer periphery of the connecting portion along the circumferential direction of the connecting portion. Providing the fixing part on the outer periphery of the connecting part can facilitate the fixing part to be arranged between the inner wall of the mounting hole and the connecting part, so that the fixing part is located in the mounting hole, which not only increases the stability of the connection between the inner wall of the mounting hole and the connecting part. It can also reduce the interference of fixing parts on the internal or external structure of the shell.

In some embodiments, the mounting hole includes a first hole section and a second hole section that are connected to each other. The first hole section is connected to the outside of the housing, and the second hole section is connected to the inside of the housing. The first hole section and the second hole section are connected to each other. The connection points form a step surface facing the outside of the casing, and the fixing member is supported on the step surface. The step surface can limit the movement of the fixing piece toward the inside of the housing, and the first hole section and the second hole section can limit the radial movement range of the fixing piece along the installation hole, which is beneficial to the installation of the fixing piece and also to the installation of the fixing piece. The fasteners then remain structurally stable.

In some embodiments, the fixing member includes: a fixing section and an insertion section arranged along the preset axis direction. The insertion section is arranged in the second hole section, and the fixing section is arranged in the first hole section and is supported on the step surface. superior. The step surface can limit the movement of the fixed section toward the inside of the housing, the second hole section can limit the radial movement range of the fixed section along the mounting hole, and the first hole section can limit the radial movement range of the insertion section along the mounting hole, thereby facilitating Install the fixtures.

In some embodiments, the battery cell further includes a sealing ring, which is disposed between the fixed section and the stepped surface to improve the sealing performance between the fixed section and the stepped surface, thereby improving the reliability of the battery cell.

In some embodiments, the housing includes a housing and an end cover, the housing is provided with an open end, the end cover is provided at the open end, and the sampling component is accommodated inside the housing; the end cover forms a wall; and a mounting hole is opened in the end cover . By opening the mounting hole in the end cover, it is helpful to seal the mounting hole.

In some embodiments, the sampling component includes multiple sampling modules, each sampling module is connected to at least one connection part, and the environmental information inside the housing can be obtained through the sampling module, so as to improve the effectiveness of managing the working status of the battery cells. This further improves the stability of the battery cell operation.

In some embodiments, the battery cell further includes: a circuit board, which is disposed outside the housing and electrically connected to the connection portion. The environmental information obtained by the sampling component is processed through a circuit board arranged outside the casing and electrically connected to the connection part to determine the gas composition and concentration, temperature or pressure inside the casing, thereby analyzing the working status of the battery cells. analyze.

In some embodiments, the circuit board is disposed on a side of the wall facing away from the sampling assembly. By arranging the circuit board on the side of the wall away from the sampling component, that is, the outside of the housing, the installation and removal of the circuit board are facilitated. The wall can prevent the circuit board from contacting the electrode assembly and the electrolyte, thereby reducing the risk of the circuit board being short-circuited due to contact with the electrode assembly, and at the same time reducing corrosion of the circuit board by the electrode assembly and the electrolyte.

In a second aspect, this application provides a battery, including the above-mentioned battery cell. Such an arrangement can reduce the number of openings on the outer casing of the battery cell to increase its strength, reduce the risk of structural strength failure, simplify the process and save costs; further, it can also reduce the space occupied by the openings and improve Compact structure.

In some embodiments, the battery further includes: a battery management unit electrically connected to the connection part. The battery management unit is electrically connected to the connection part, so that the battery management unit automatically manages the battery cells according to the environmental information obtained by the sampling component.

In some embodiments, the battery further includes: a box body, in which the battery cells are arranged; and a circuit board, which is arranged outside the box body and is electrically connected to the connection part. Through the circuit board arranged in the box and electrically connected to the connection part, the environmental information obtained by the sampling component is processed to determine the gas composition and concentration, temperature or pressure inside the casing, thereby analyzing the working status of the battery cells.

In a third aspect, the present application provides an electrical device, including the above-mentioned battery. Such an arrangement can reduce the number of openings on the outer casing of the battery cell to increase its strength, reduce the risk of structural strength failure, simplify the process and save costs; further, it can also reduce the space occupied by the openings and improve Compact structure.

Description of the drawings

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 drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the application. Also, the same parts are represented by the same reference numerals throughout the drawings. In the attached picture:

Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments;

Figure 2 is an exploded structural diagram of a battery according to one or more embodiments;

Figure 3 is an exploded structural diagram of a battery cell according to one or more embodiments;

Figure 4 is a schematic structural block diagram of a battery cell according to one or more embodiments;

Figure 5 is a schematic structural diagram of the wall portion, electrode post, connecting portion and plastic parts of the battery cell shown in Figure 3;

Figure 6 is a top structural schematic diagram of the structure shown in Figure 5;

Figure 7 is a partial structural schematic diagram of the cross-section along the A-A section line of the structure shown in Figure 6;

Figure 8 is an enlarged structural schematic diagram of structure B in the structure shown in Figure 7;

Figure 9 is another structural schematic diagram of a battery cell according to one or more embodiments;

Figure 10 is another structural schematic diagram of a battery cell according to one or more embodiments;

Figure 11 is yet another structural schematic diagram of a battery cell according to one or more embodiments.

The reference numbers in the specific implementation are as follows:

1000a vehicles;

100a battery; 200a controller; 300a motor;

10a box; 11a first part; 12a second part;

1 battery cell; 100 shell; 101 wall; 102 mounting hole; 142 first hole section; 122 second hole section; 132 step surface; 110 shell; 111 open end; 112 opening; 120 end cover; 152 sealing ring ; 200 electrode assembly; 201 pole lug; 300 circuit board; 400 sampling assembly; 500 fixing parts; 600 plastic parts; 700 connection part; 707 insulating substrate; 710 first connection part; 720 second connection part; 800 insulation parts; 900 Electrode column; F preset axis.

Detailed ways

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

Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the technical field belonging to this application; the terms used herein are for the purpose of describing specific embodiments only and are not intended to be used in Limitation of this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

In the description of the embodiments of this application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity or specificity of the indicated technical features. Sequence or priority relationship. In the description of the embodiments of this application, "plurality" means two or more, unless otherwise explicitly and specifically limited.

Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of this application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to It is more than two pieces (including two pieces).

In the description of the embodiments of this application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right" and "vertical" The orientation or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the embodiments of the present application and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the implementation of the present application. Example limitations.

In the description of the embodiments of this application, unless otherwise clearly stated and limited, technical terms such as "installation", "connection", "connection" and "fixing" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. It can be disassembled and connected, or integrated; it can also be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

With the development of battery technology, battery cells are used in more and more fields and gradually replace traditional fossil energy in the field of automotive power. Battery cells can store chemical energy and controllably convert chemical energy into electrical energy. In recyclable battery cells, the active materials can be activated by charging after discharge and continue to be used.

Generally, a battery cell includes a casing and an electrode assembly, a sampling assembly, etc. housed in the casing. The electrode assembly is electrically connected to the outside world through the electrode column, and the sampling assembly is electrically connected to the outside world through the connecting column. In the existing battery cell structure, the sampling component usually includes one or more connecting posts, and when the number of sampling components is multiple, the number of connecting posts also increases. In order to facilitate the installation of the connecting posts, a plurality of mounting holes are usually opened on the housing, so that the connecting posts are installed at the plurality of mounting holes correspondingly to achieve electrical connection between the connecting posts and the outside world. But on the one hand, the strength of the casing will decrease as the number of mounting holes increases. As the number of mounting holes increases, the risk of structural strength failure of the battery cells will increase. On the other hand, the sealing performance of the casing will also increase as the number of mounting holes increases. The number of mounting holes decreases as the number of mounting holes increases; on the other hand, because the connecting posts corresponding to each mounting hole need to be installed in the corresponding mounting hole, that is, they need to be fixedly connected to the shell. As the number of mounting holes increases, the number of battery cells increases. The overall process complexity is high and the cost is high.

Furthermore, during the use of the battery cell, especially the use of the secondary battery, it undergoes multiple charge and discharge cycles, and there are side reactions. Gas will continue to be generated inside the battery cell, or the electrode assembly in the casing will generate The expansion phenomenon causes a certain air pressure inside the casing, which will further increase the risk of structural strength failure of the battery cells.

Based on the above considerations, this application provides battery cells, batteries and electrical devices. Wherein, the battery cell includes a casing, including a wall, and the wall is provided with a mounting hole connecting the inside and outside of the casing; the sampling component is accommodated inside the casing; a plurality of insulating connecting parts are arranged in the mounting hole and blocked The mounting holes and multiple connecting parts are electrically connected to the sampling component. In this way, multiple connecting portions for insulating connections that block the mounting hole can be installed through the same mounting hole on the casing, that is, multiple connecting portions for insulating connection can be installed through one mounting hole, which can reduce the number of mounting holes on the casing. quantity, thereby reducing the risk of structural strength failure of the battery cells, improving the sealing performance of the casing, reducing the process complexity of the battery cells, saving costs, and improving the compactness of the structure.

The battery cells, batteries and electrical devices disclosed in the embodiments of the present application can be used in electrical devices that use batteries as power sources or in various energy storage systems that use batteries as energy storage elements. Electric devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.

For the convenience of explanation in the following embodiments, an electric device in an embodiment of the present application is a vehicle 1000a.

Please refer to Figure 1. The vehicle 1000a may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. The battery 100a is disposed inside the vehicle 1000a, and the battery 100a may be disposed at the bottom, head, or tail of the vehicle 1000a. The battery 100a may be used to power the vehicle 1000a. For example, the battery 100a may serve as an operating power source for the vehicle 1000a. The vehicle 1000a may also include a controller 200a and a motor 300a. The controller 200a is used to control the battery 100a to provide power to the motor 300a, for example, for the starting, navigation and operating power requirements of the vehicle 1000a.

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

In some embodiments, battery 100a may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

The battery 100a mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells 1 to provide higher voltage and capacity.

In the embodiment of the present application, the battery cell 1 may be a secondary battery. The secondary battery refers to a battery cell 1 that can activate active materials through charging and continue to be used after the battery cell 1 is discharged. Each battery cell 1 can also be a primary battery.

The battery cells 1 include, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel metal hydride batteries, nickel cadmium batteries, lead storage batteries, etc. The battery cell 1 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.

In some embodiments, the battery 100a may be a battery module. When there are multiple battery cells 1, the multiple battery cells 1 are arranged and fixed to form a battery module.

In some embodiments, please refer to FIG. 2 . The battery 100a may be a battery pack. The battery pack includes a case 10a and a battery cell 1. The battery cell 1 or battery module is accommodated in the case 10a.

In some embodiments, the box 10a may be part of the chassis structure of the vehicle 1000a. For example, portions of the box 10a may become at least part of the floor of the vehicle 1000a, or portions of the box 10a may become at least part of the cross members and longitudinal members of the vehicle 1000a.

Referring to FIG. 2 , the battery 100a includes a case 10a and a battery cell 1. The battery cell 1 is accommodated in the case 10a. Among them, the box 10a is used to provide a storage space for the battery cell 1, and the box 10a can adopt a variety of structures. In some embodiments, the box body 10a may include a first part 11a and a second part 12a. The first part 11a and the second part 12a cover each other. The first part 11a and the second part 12a jointly define a space for accommodating the battery cells 1 of accommodation space. The second part 12a may be a hollow structure with one end open, and the first part 11a may be a plate-like structure. The first part 11a covers the open side of the second part 12a, so that the first part 11a and the second part 12a jointly define a receiving space. ; The first part 11a and the second part 12a may also be hollow structures with one side open, and the open side of the first part 11a is covered with the open side of the second part 12a. Of course, the box 10a formed by the first part 11a and the second part 12a can be in various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In the battery 100a, there may be a plurality of battery cells 1, and the plurality of battery cells 1 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery cells 1 are connected in series and in parallel. Multiple battery cells 1 can be directly connected in series or in parallel or mixed together, and then the whole composed of multiple battery cells 1 is accommodated in the box 10a; of course, the battery 100a can also be multiple battery cells 1 The battery modules are first connected in series, parallel, or mixed, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10a. The battery 100a may also include other structures. For example, the battery 100a may also include a bus component for realizing electrical connections between multiple battery cells 1 .

Please refer to Figure 3. The battery cell 1 refers to the smallest unit that makes up the battery. In this embodiment, the cylindrical battery cell 1 is taken as an example for description. As shown in Figure 3, the battery cell 1 includes a casing 100, an electrode assembly 200 and other functional components.

In some embodiments, the housing 100 is used to package the electrode assembly 200 and electrolyte and other components. The shell 100 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or aluminum-plastic film.

Housing 100 may include end cap 120 and housing 110 . The end cap 120 refers to a component that covers the opening of the case 110 to isolate the internal environment of the battery cell 1 from the external environment. Without limitation, the shape of the end cap 120 may be adapted to the shape of the housing 110 to fit the housing 110 . Optionally, the end cap 120 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 120 is less likely to deform when subjected to extrusion and collision, so that the battery cell 1 can have higher durability. Structural strength and safety performance can also be improved. The end cap 120 may be provided with functional components such as the electrode post 900 . The electrode post 900 may be used to electrically connect with the electrode assembly 200 for outputting or inputting electrical energy of the battery cell 1 . In some embodiments, the end cap 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold. The end cap 120 can also be made of various materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating component may also be provided inside the end cover 120 , and the insulating component may be used to isolate the electrical connection components in the housing 110 from the end cover 120 to reduce the risk of short circuit. For example, the insulating component may be plastic, rubber, etc.

The housing 110 is a component used to cooperate with the end cover 120 to form an internal environment of the battery cell 1 , wherein the formed internal environment can be used to accommodate the electrode assembly 200 , electrolyte, and other components. The housing 110 and the end cover 120 may be independent components, and an opening 112 may be provided on the housing 110. The end cover 120 covers the opening 112 at the opening 112 to form the internal environment of the battery cell 1. Without limitation, the end cap 120 and the shell 110 can also be integrated. Specifically, the end cap 120 and the shell 110 can form a common connection surface before other components are put into the shell. When it is necessary to encapsulate the inside of the shell 110 When, the end cover 120 is closed with the housing 110 again. The housing 110 may be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 110 can be determined according to the specific shape and size of the electrode assembly 200 . The housing 110 may be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The electrode assembly 200 is a component in the battery cell 1 where electrochemical reactions occur. One or more electrode assemblies 200 may be contained within the housing 110 .

In some embodiments, electrode assembly 200 includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell 1, active ions (such as lithium ions) are inserted and detached back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting and allow active ions to pass through.

In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

As an example, the positive electrode current collector has two surfaces opposite in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

As an example, the positive electrode current collector may use a metal foil or a composite current collector. For example, as the metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector may include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming metal materials (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver and silver alloys, etc.) on polymer material substrates (such as polypropylene, polyethylene terephthalate). ester, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, the cathode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials of batteries can also be used. Only one type of these positive electrode active materials may be used alone, or two or more types may be used in combination. Examples of lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), composite materials of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon At least one of composite materials, lithium iron manganese phosphate, and composite materials of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxides (such as LiCoO ₂ ), lithium nickel oxides (such as LiNiO ₂ ), lithium manganese oxides (such as LiMnO ₂ , LiMn2O ₄ ), lithium nickel cobalt oxides , lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi _1/3 Co _1/3 Mn _1/3 O ₂ (also referred to as NCM ₃₃₃ ), LiNi _0.5 Co _0.2 Mn _0.3 O ₂ (can also be abbreviated to NCM ₅₂₃ ), LiNi _0.5 Co _0.25 Mn _0.25 O ₂ (can also be abbreviated to NCM ₂₁₁ ), LiNi _0.6 Co _0.2 Mn _0.2 O ₂ (can also be abbreviated to NCM ₆₂₂ ), LiNi _0.8 Co _0.1 Mn At least one of _0.1 O ₂ (also referred to as NCM ₈₁₁ ), lithium nickel cobalt aluminum oxide (such as LiNi _0.85 Co _0.15 Al _0.05 O ₂ ) and its modified compounds.

In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

As examples, the negative electrode current collector may use metal foil, foam metal or composite current collector. For example, as the metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. The metal foam can be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, etc. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming metal materials (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as polypropylene, polyethylene terephthalate glycol). ester, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

As an example, the negative electrode current collector has two surfaces opposite in its own thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

As an example, the negative active material may be a negative active material known in the art for the battery cell 1 . As an example, the negative active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, and the like. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon carbon composites, silicon nitrogen composites and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as battery negative electrode active materials can also be used. Only one type of these negative electrode active materials may be used alone, or two or more types may be used in combination.

In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

In some embodiments, the electrode assembly 200 further includes a separator disposed between the positive electrode and the negative electrode.

In some embodiments, the separator is a separator. There is no particular restriction on the type of isolation membrane in this application. Any well-known porous structure isolation membrane with good chemical stability and mechanical stability can be used.

As an example, the main material of the isolation membrane can be at least one selected from the group consisting of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The isolation film can be a single-layer film or a multi-layer composite film, with no special restrictions. When the isolation film is a multi-layer composite film, the materials of each layer can be the same or different, and there is no particular limitation. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.

In some embodiments, the separator is a solid electrolyte. The solid electrolyte is located between the positive and negative electrodes and plays the role of transporting ions and isolating the positive and negative electrodes.

In some embodiments, the battery cell 1 further includes an electrolyte, and the electrolyte plays a role in conducting ions between the positive and negative electrodes. There is no specific restriction on the type of electrolyte in this application, and it can be selected according to needs. Electrolytes can be liquid, gel or solid.

Among them, the liquid electrolyte includes electrolyte salt and solvent.

In some embodiments, the electrolyte salt may be selected from the group consisting of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonimide, lithium bistrifluoromethanesulfonimide, trifluoromethane At least one of lithium sulfonate, lithium difluorophosphate, lithium difluoroborate, lithium dioxaloborate, lithium difluorodioxalate phosphate and lithium tetrafluoroxalate phosphate.

In some embodiments, the solvent may be selected from the group consisting of ethylene carbonate, propylene carbonate, methylethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, Butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate At least one of ester, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. Ether solvents can also be used as solvents. Ether solvents may include glycol dimethyl ether, ethylene glycol diethyl ether, diglyme, triglyme, tetraethylene glycol dimethyl ether, and 1,3-dioxolane. , one or more of tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

Among them, the gel electrolyte includes a skeleton network with polymer as the electrolyte, paired with ionic liquid-lithium salt.

Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

As examples, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids -Lithium salt, cellulose, etc.

As examples, the inorganic solid electrolyte may be an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor ( Lithium germanium phosphorus sulfur, sulfide silver germanium ore), amorphous sulfide) and one or more of halide solid electrolytes, nitride solid electrolytes and hydride solid electrolytes.

As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

In some embodiments, electrode assembly 200 is a rolled structure. The positive electrode sheet and the negative electrode sheet are wound into a winding structure.

In some embodiments, the electrode assembly 200 is provided with tabs 201 that can conduct current away from the electrode assembly 200 . The pole ears include positive pole ears and negative pole ears. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body. During the charging and discharging process of the battery 100a, the positive active material and the negative active material react with the electrolyte, and the tab 201 is connected to the electrode post 900 to form a current loop.

According to some embodiments of the present application, as shown in FIGS. 3 to 8 , the battery cell 1 described in the embodiment of the battery cell 1 of the present application includes a housing 100 , a sampling component 400 and a plurality of insulated connection parts 700 . The housing 100 includes a wall portion 101, and the wall portion 101 is provided with a mounting hole 102 that communicates the inside and outside of the housing 100; the sampling assembly 400 is accommodated inside the housing 100; a plurality of insulated connecting portions 700 are provided in the mounting hole 102 and blocked. The mounting holes 102 and the plurality of connection parts 700 are electrically connected to the sampling assembly 400 .

Specifically, multiple connecting portions 700 are integrated to block the mounting hole 102 directly or through an insulator. The connecting portion 700 extends along the axial direction of the mounting hole 102 to connect the sampling assembly 400 provided in the housing 100 and realize electrical transmission between the sampling assembly 400 and devices outside the housing 100 .

The connection part 700 refers to a component or structural part used to achieve electrical connection, and the connection part 700 may include a conductive part such as a metal part.

The size, shape and number of the connecting parts 700 can be set according to the size, electrical parameters and other requirements of the sampling component 400 and the battery cell 1 .

Optionally, the outer contour shape of the multiple connecting portions 700 of insulating connections or the outer contour shape of the insulating piece outside the connecting portions 700 matches the shape of the mounting hole 102 , so that the mounting hole 102 is used to connect the multiple connecting portions 700 of insulating connections. Perform installation positioning.

The sampling component 400 is used to obtain environmental information inside the housing 100 , generate an electrical signal based on the environmental information, and transmit the electrical signal to a device outside the housing 100 through the connecting portion 700 .

In the above manner, multiple connecting portions 700 for insulating connection that block the mounting hole 102 can be installed through the same mounting hole 102 on the housing 100 , that is, multiple connecting portions 700 for insulating connection can be installed through one mounting hole 102 . The number of mounting holes 102 on the housing can be reduced. On the one hand, since the strength of the casing 100 will decrease as the number of mounting holes 102 increases, the above structure can increase the strength of the casing 100 and reduce the risk of structural strength failure of the battery cell 1; on the other hand, due to the The sealing performance will also decrease as the number of mounting holes 102 increases, so the above structure can also improve the sealing performance of the housing 100; on the other hand, because the connecting column corresponding to each mounting hole needs to be installed at the corresponding mounting hole, that is, It needs to be fixedly connected to the casing. As the number of mounting holes 102 increases, the complexity of the process of the battery cell 1 will also increase. For example, it is necessary to process a stepped surface for each mounting hole 102 on the casing 100, which is costly, so , the above structure can also reduce the process complexity of the battery cell 1 and save costs. Furthermore, integrating multiple connecting portions 700 with insulation connections in the same mounting hole 102 can reduce the area occupied by the mounting holes 102 on the housing compared to providing independent mounting holes 102 without connecting portions 700 , thereby reducing the area occupied by the mounting holes 102 on the housing. It can improve the compactness of the structure.

Of course, the battery cell 1 also includes an electrode assembly 200. The electrode assembly 200 is accommodated inside the casing 100. For detailed introduction, please refer to the above.

In some embodiments, the plurality of connecting portions 700 include a first connecting portion 710 disposed along the preset axis F and a second connecting portion surrounding at least part of the periphery of the first connecting portion 710 along the circumferential direction of the first connecting portion 710 720.

Specifically, being arranged along the preset axis F refers to being arranged along the preset axis F, that is, the axis of the first connecting part 710 coincides with or is parallel to the preset axis F, and the preset axis F passes through the inside of the first connecting part 710 ; The preset axis F is the axis of the connecting body formed by the integrated arrangement of multiple connecting parts 700. The connecting body can be arranged in a shape such as a columnar shape. When the connecting part 700 is arranged perpendicularly to the wall part 101 , the preset axis F may also be the axis of the mounting hole 102 . The circumferential direction of the preset axis F refers to the direction perpendicular to the preset axis F and surrounding the preset axis F.

By arranging the first connection portion 710 along the preset axis F, the area occupied by the plurality of insulated connection portions 700 on the wall portion 101 can be reduced, thereby reducing the opening area of the mounting hole 102 and thereby improving the strength of the wall portion 101 . Strength and sealing performance; and arranging the second connecting part 720 around at least part of the outer periphery of the first connecting part 710 can reduce the arrangement area between the second connecting part 720 and the first connecting part 710, thereby further reducing the installation hole. The opening area of 102 further improves the strength and sealing performance of the wall portion 101 and improves the compactness of the structure.

The number of the second connection parts can be set according to the structural requirements and performance requirements of the sampling component 400 inside the housing 100, and the specific details of the second connection part can be set according to the structural requirements and performance requirements of the sampling component 400, the opening area of the mounting hole 102, etc. location and size.

In some embodiments, the second connecting portion 720 is closed around the outer periphery of the first connecting portion 710 .

The second connecting part 720 is closed around the outer periphery of the first connecting part 710, and the second connecting part 720 is sleeved on the outer periphery of the first connecting part 710, which can further reduce the space between the second connecting part 720 and the first connecting part 710 on the wall. The occupied area of the wall portion 101 can be reduced, thereby reducing the opening area of the mounting hole 102, thereby improving the strength and sealing performance of the wall portion 101; and improving the compactness of the structure. And the size of the second connection part 720 is increased to improve the electrical performance.

In some embodiments, as shown in FIG. 9 , the number of the second connecting portions 720 is at least two, and the at least two second connecting portions 720 are arranged at intervals along the circumferential direction of the first connecting portion 710 .

Through the above method, at least three connecting parts 700 can be realized, and the second connecting part 720 is provided around at least part of the outer periphery of the first connecting part 710, so that the arrangement between the second connecting part 720 and the first connecting part 710 can be reduced. Therefore, the opening area of the mounting hole 102 can be further reduced, thereby further improving the strength and sealing performance of the wall portion 101 and improving the compactness of the structure.

For example, the first connecting portion 710 is disposed on the preset axis F, and the two second connecting portions 720 are disposed at intervals along the circumferential direction of the first connecting portion 710 .

The embodiments of the present application do not limit whether the size and arrangement of the plurality of second connecting portions 720 are uniform.

In other embodiments, there may be three or more second connecting parts, and they may be located on the same outer circumference of the first connecting part, or on multiple different outer circumferences of the first connecting part.

The fact that the plurality of second connecting parts are located on the same outer periphery of the ring means that the distances between the plurality of second connecting parts and the first connecting part are equal.

In some embodiments, as shown in FIG. 10 , the connecting portion 700 is partially disposed around the predetermined axis F, and the plurality of connecting portions 700 are spaced apart from each other along the circumferential direction of the predetermined axis F.

The connecting portion 700 is partially arranged around the preset axis F, and the plurality of connecting portions 700 are spaced apart from each other along the circumferential direction of the preset axis F, so that the plurality of connecting portions 700 are located on the same outer periphery of the preset axis F, and the multiple connecting portions 700 can be reduced in size. The area occupied by the connecting portion 700 on the wall portion 101 can thereby reduce the opening area of the mounting hole 702, improve the strength and sealing performance of the housing 100, and improve the compactness of the structure.

In other embodiments, a plurality of circumferentially arranged connecting portions may be located on the outer circumference of the same ring, may be located on the outer circumferences of different rings, or may be partially located on the outer circumference of the same ring.

In some embodiments, as shown in FIGS. 3 to 10 , the battery cell 1 further includes an insulating member 800 disposed between a plurality of connecting parts 700 .

Insulators 800 are provided between adjacent connecting portions 700 to improve interference between multiple connecting portions 700 , such as electrical signal interference, so as to improve the reliability of the battery cell 1 .

The insulation part 800 may include plastic parts or the like. Plastic material facilitates the molding of plastic parts. Or the insulating member 800 may include an insulating member with better heat dissipation, such as ceramics.

In some embodiments, the connecting portion 700 and the insulating member 800 are integrally injection molded. In this way, the connection stability between the connection part 700 and the insulator 800 can be improved, thereby improving the reliability of the battery cell 1 , and the installation process between the connection part 700 and the insulator 800 can be simplified, further reducing the battery cost. Process complexity of monomer 1.

In some embodiments, as shown in FIGS. 3 to 8 , the battery cell 1 further includes a fixing part 500 , the connecting part 700 is fixed to the fixing part 500 , and the fixing part 500 fixes the connecting wall part 101 .

The connection between the connecting part 700 and the wall part 101 is realized through the fixing part 500, which can improve the stability between the connecting part 700 and the wall part 101, and can reduce problems such as damage to the connecting part 700 during the installation process.

In some embodiments, the fixing member 500 is fixed to the outer periphery of the connecting portion 700 at least partially around the circumferential direction of the connecting portion 700 .

Disposing the fixing part 500 on the outer periphery of the connecting part 700 can facilitate the fixing part 500 being disposed between the inner wall of the mounting hole 102 and the connecting part 700 so that the fixing part 500 is located in the mounting hole 102 , which not only increases the inner wall of the mounting hole 102 The connection with the connecting portion 700 is stable and can also reduce the interference of the fixing member 500 on the internal or external structure of the housing 100 .

Optionally, the fixing part 500 can be a metal bracket. The metal bracket is provided with a mounting hole. The connecting part 700 is installed in the mounting hole. The metal bracket is used as the fixing part 500 of the connecting part 700 to connect with the wall part 101. The connection stability is improved because the metal bracket can be connected to the wall portion 101 using a more stable connection method such as welding or riveting, thereby improving the reliability of the battery cell 1 .

Another insulating piece can also be provided on the inner wall of the mounting hole 102 to achieve insulation isolation between the metal bracket and the connecting portion 700 and improve the reliability of the battery cell 1 .

In some embodiments, as shown in FIG. 9 , the battery cell 1 further includes an insulating substrate 707 . The insulating substrate 707 is covered on the side of the metal bracket facing away from the inside of the housing 100 . The insulating substrate 707 is provided with an insulating substrate 707 corresponding to the mounting hole 102 . Another connected mounting hole, the connecting portion 700 is embedded in the corresponding mounting hole 102 and the mounting hole on the insulating substrate 707 . On the one hand, the strength of the metal bracket can be increased; on the other hand, the insulating substrate 707 has electrical and liquid isolation and buffering effects on the metal bracket, which can reduce the problem of damage or interference to the metal bracket.

The insulating substrate 707 may include a plastic substrate or the like. Plastic material facilitates the molding of plastic substrates. Or the insulating substrate 707 may include an insulating substrate with better heat dissipation, such as a ceramic substrate.

In some embodiments, the metal bracket is welded and fixed to the wall 101 . The welding process can form a molten body, and after solidification, the molten body can connect the metal bracket and the wall portion 101, which can improve the stability between the metal bracket and the wall portion 101, thereby improving the reliability of the battery cell 1.

In some embodiments, as shown in FIG. 9 , the mounting hole 102 includes a first hole section 142 and a second hole section 122 that are connected to each other. The first hole section 142 is connected to the outside of the housing 100 , and the second hole section 122 is connected to the inside of the housing 100 . , the first hole section 142 and the second hole section 122 form a step surface 132 facing the outside of the housing at their connection point, and the fixing member 500 is supported on the step surface 132 .

The step surface 132 can limit the movement of the fixing part 500 toward the inside of the housing 100. The first hole section 142 and the second hole section 122 can limit the radial movement range of the fixing part 500 along the mounting hole 102, which is beneficial to the installation of the fixing part 500. It is also beneficial to keep the fixing part 500 structurally stable after the fixing part 500 is installed.

The axial direction of the mounting hole 102 refers to the spacing direction between the end of the mounting hole 102 facing the inside of the housing 100 and the end away from the inside of the housing 100 . The radial direction of the mounting hole 102 is perpendicular to the axial direction of the mounting hole 102 .

In some embodiments, the fixing member 500 includes: a fixing section and an insertion section arranged along the direction of the preset axis F, the insertion section is arranged in the second hole section 122, the fixing section is arranged in the first hole section 142, and Supported on the step surface 132.

The step surface 132 can limit the movement of the fixed section toward the inside of the housing 100 , the second hole section 122 can limit the movement range of the fixed section along the radial direction of the mounting hole 102 , and the first hole section 142 can limit the radial movement of the insertion section along the mounting hole 102 range of movement, thereby facilitating the installation of the fixing member 500.

Alternatively, the fixing section and the wall portion 101 can be connected by welding.

In some embodiments, the battery cell 1 also includes a sealing ring 152 disposed between the fixed section and the stepped surface 132 to improve the sealing performance between the fixed section and the stepped surface 132, thereby improving the reliability of the battery cell 1. sex.

In some embodiments, the connection part 700 may include a plurality of signal parts, and the signal parts are electrically connected to the sampling component 400 .

In some embodiments, the connection part 700 may also include two power supply parts and at least one signal part. The battery cell 1 includes two electrode posts 900 , and the two electrode posts 900 are disposed on the wall part 101 and extend to the outside of the housing 100 ; The two power supply parts are electrically connected to the two electrode posts 900 outside the housing 100 to provide power to the sampling assembly 400.

By connecting the connecting portion 700 to the electrode post 900 outside the housing 100 and supplying power to the sampling component 400 inside the housing 100 through the connecting portion, the power supply circuit structure inside the housing 100 can be reduced, which facilitates maintenance and improves the safety of the battery cell 1 .

In some embodiments, as shown in Figure 3, the housing 100 includes a housing 110 and an end cover 120. The housing 110 is provided with an open end 111. The end cover 120 covers the open end 111. The sampling assembly 400 and the electrode assembly 200 contain placed inside the housing 110. End cap 120 forms wall 101 . The mounting hole 102 is opened in the end cover 120 .

The open end 111 may be provided with the above-mentioned opening 112 . By opening the mounting hole 102 in the end cover 120 , the mounting hole 102 is facilitated to be blocked.

Optionally, the sampling assembly 400 can be disposed inside the end cover 120 to facilitate the installation of the sampling assembly 400 and the collection of the environment inside the housing 100 .

Optionally, the sampling component 400 can be connected to the inner side of the end cover 120 through injection molding or pasting, or connected to other components in the housing 100 to facilitate the routing of the sampling component 400 .

The end cap 120 can serve to position the two electrode posts 900 . The electrode post 900 can be fixed relative to the end cap 120 .

Specifically, one end of the electrode post 900 is disposed toward the inside of the housing 100 and can be used to electrically connect the electrode assembly 200 provided in the housing 100. The other end of the electrode post 900 is disposed toward the outside of the housing 100 and can be used to connect the outside world and the circuit board 300. Therefore, the electrode assembly 200 can supply power to the outside world and the circuit board 300 through the electrode posts 900 respectively.

Further, the electrode assembly 200 can be charged through the electrode column 900 .

In other embodiments, housing 110 may form wall 101 . The mounting hole 102 may be opened in the housing 110 , for example, in the bottom wall of the housing 110 , and the bottom wall of the housing 110 is opposite to the opening end 111 . With this arrangement, the installable area of the connecting portion 700 can be increased.

In some embodiments, the sampling assembly 400 includes a plurality of sampling modules, each sampling module being connected to at least one connection 700 .

The sampling module is used to sample the environment inside the housing 100 . During the use of the battery cell 1 , the interior of the casing 100 is often in a dynamic change process. For example, the electrode assembly 200 may expand in volume, or the temperature and pressure inside the casing 100 may change, or there may be gas inside the casing 100 . of generation. The environmental information inside the casing 100 can be obtained through the sampling module, such as sampling the gas, temperature or pressure inside the casing 100, so as to improve the effectiveness of managing the working status of the battery cell 1, thereby improving the working efficiency of the battery cell 1. stability.

The number of connection parts 700 to which the sampling module is connected can be set according to the type and structural requirements of the sampling module.

In some embodiments, the sampling component 400 may include a sampling module, which is provided with multiple signal terminals, and the multiple signal terminals may be electrically connected to multiple connection parts 700 respectively; or the sampling component 400 may include multiple sampling modules, each Each sampling module may be provided with a single or multiple signal terminals to connect with a single or multiple connection portions 700 .

In some embodiments, sampling assembly 400 may include one or more of a barometric pressure sampling module, a gas sampling module, or a temperature sampling module.

The air pressure sampling module can be used to detect the air pressure within the housing 100 . Changes in air pressure may occur during the operation of the battery cell 1 , for example, gas is generated inside the casing 100 or the temperature rises, causing the air pressure to rise rapidly. The air pressure inside the housing 100 can be detected through the air pressure sampling module, which is beneficial to managing the working status of the battery cell 1 .

A temperature sampling module can be used to detect the temperature within the housing 100 . Temperature changes, such as temperature increases, may occur during the operation of the battery cell 1 . Detecting the temperature inside the housing 100 through the temperature sampling module is beneficial to managing the working status of the battery cell 1 .

The gas sampling module can be used to detect the type of gas in the housing 100, which is beneficial to managing the working status of the battery cell 1.

Optionally, the above-mentioned sampling module can be disposed in a packaging shell, and the packaging shell is connected to the end cover 120 to improve the reliability of the sampling module.

The packaging shell can protect the sampling module. On the one hand, the packaging shell can reduce the damage to the sampling module caused by external factors of the shell 100. On the other hand, the packaging shell can block between the sampling module, the electrode assembly 200 and the electrolyte, thereby reducing the number of pairs of electrolyte and electrode assembly 200 inside the shell 100. corrosion of the sampling module, and reduce the risk of short circuit caused by direct contact between the sampling module and the electrode assembly 200 .

Optionally, the packaging shell can be welded and fixed with the end cover 120 .

In some embodiments, as shown in FIGS. 3 and 5 , the battery cell 1 further includes a plastic part 600 located at the electrode assembly 200 and the wall 101 .

The plastic part 600 is made of plastic material, and the plastic material facilitates the molding of the plastic part 600 .

Furthermore, the plastic part 600 is made of insulating material and can form insulation between the electrode assembly 200 and the wall part 101, thereby limiting the current flowing directly from the electrode assembly 200 to the wall part 101 or directly from the wall part 101 to the electrode assembly 200.

In some embodiments, as shown in FIG. 11 , the battery cell 1 further includes a circuit board 300 . The circuit board 300 is disposed outside the housing 100 and is electrically connected to the connecting portion 700 .

The environmental information obtained by the sampling component 400 is processed through the circuit board 300 that is arranged outside the housing 100 and is electrically connected to the connecting part 700 to determine the gas composition and concentration, temperature or pressure inside the housing 100, so as to analyze the battery cells. Analyze the working status of body 1.

In some embodiments, the circuit board 300 is disposed on a side of the wall 101 facing away from the sampling assembly 400 , that is, a side of the wall 101 facing away from the interior of the housing 100 .

By arranging the circuit board 300 on the side of the wall 101 away from the sampling assembly 400, that is, the outside of the housing 100, the installation and removal of the circuit board 300 is facilitated. The wall 101 can prevent the circuit board 300 from contacting the electrode assembly 200 and the electrolyte, thereby reducing the risk of the circuit board 300 being short-circuited due to contact with the electrode assembly 200 and reducing corrosion of the circuit board 300 by the electrode assembly 200 and the electrolyte.

In some embodiments, the battery cell 1 further includes a processor, which is disposed on the circuit board 300 and electrically connected to the connecting portion 700 .

The processor can process the environmental information sampled by the sampling component 400, so that the battery cell 1 can become intelligent. For example, the processor can determine the gas composition and concentration, temperature or pressure inside the housing 100 based on the environmental information obtained by the sampling component 400, so as to analyze the working status of the battery cell 1.

The processor may be an integrated circuit chip that has signal processing capabilities. The processor may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

For example, the processor is an MCU. By disposing the processor on the circuit board 300, the connection stability between the processor and the circuit board 300 can be improved, thereby improving the connection stability between the processor and the sampling component 400.

The space on the side of the circuit board 300 facing away from the inside of the housing 100 is relatively spacious. The processor can be placed on the side of the circuit board 300 facing away from the inside of the housing 100 , which is beneficial to the heat dissipation of the processor.

In some embodiments, as shown in FIGS. 3 to 8 , the battery cell 1 includes a housing 100 , a sampling component 400 , and a plurality of insulated connecting portions 700 . The housing 100 includes an end cover 120, and the end cover 120 is provided with a mounting hole 102 that communicates the inside and outside of the housing 100; the sampling assembly 400 is accommodated inside the housing 100; a plurality of insulated connecting portions 700 are provided in the mounting hole 102 and blocked. The mounting holes 102 and the plurality of connection parts 700 are electrically connected to the sampling assembly 400 .

Wherein, the plurality of connecting parts 700 include a first connecting part 710 arranged along the preset axis F and a second connecting part 720 surrounding at least part of the outer circumference of the first connecting part 710 along the circumferential direction of the first connecting part 710. The connecting part 720 is closed around the outer periphery of the first connecting part 710 .

Further, the battery cell 1 further includes: an insulating member 800, a fixing member 500, an insulating substrate 707, and a sealing ring 152; wherein the insulating member 800 is disposed between the plurality of connecting parts 700. The connecting part 700 is fixed to the fixing part 500, and the fixing part 500 fixes the connection end cover 120. The insulating substrate 707 covers the side of the fixing member 500 away from the inside of the housing 100. The insulating substrate 707 is provided with another mounting hole corresponding to and connected to the mounting hole 102. The connecting portion 700 is embedded in the corresponding mounting hole 102 and the insulating substrate. Mounting holes on 707. The sealing ring 152 is disposed between the fixed section and the step surface 132 . The battery cell 1 also includes a plastic part 600 located on the electrode assembly 200 and the wall part 101 .

The mounting hole 102 includes a first hole section 142 and a second hole section 122 that communicate with each other. The first hole section 142 communicates with the outside of the housing 100 , and the second hole section 122 communicates with the inside of the housing 100 . The first hole section 142 and the second hole section The segment 122 forms a step surface 132 facing the outside of the housing at the connection point between the two, and the fixing member 500 is supported on the step surface 132 . The fixing member 500 includes a fixing section and an insertion section arranged along the direction of the preset axis F. The insertion section is arranged in the second hole section 122 , and the fixing section is arranged in the first hole section 142 and is supported on the step surface 132 .

In other embodiments, multiple connecting parts can also be arranged in a spliced manner extending circumferentially around the preset axis F; or one connecting part is arranged along the preset axis F, and other connecting parts are arranged splicing around the outer circumference of the connecting part. ; The plurality of connecting parts can be arranged in a circle around the periphery or arranged in multiple circles stacked along the radial direction.

In some embodiments, as shown in Figure 2, the battery 100a includes the battery cell 1 described above. Such an arrangement can reduce the number of openings on the outer casing of the battery cell to increase its strength, reduce the risk of structural strength failure, simplify the process and save costs; further, it can also reduce the space occupied by the openings and improve Compact structure.

In some embodiments, the battery 100a further includes a battery management unit electrically connected to the connection part 700. The battery management unit is electrically connected to the connection part 700, so that the battery management unit automatically manages the battery cell 1 according to the environmental information obtained by the sampling component 400, such as processing the environmental information obtained by the sampling component 400 to determine the internal conditions of the housing 100. The gas composition and concentration, temperature or pressure are used to analyze the working status of the battery cell 1.

In some embodiments, the battery 100a also includes a case 10a and a circuit board 300. The battery cell 1 is disposed in the case 10a; the circuit board 300 is disposed outside the case 10a and is electrically connected to the connecting portion 700.

Through the circuit board 300 disposed in the box 10a and electrically connected to the connection part 700, the environmental information obtained by the sampling component 400 is processed to determine the gas composition and concentration, temperature or pressure inside the casing 100, thereby measuring the battery cell 1 Analyze the working status.

By arranging the circuit board 300 on the side of the box 10a away from the inside of the housing 100, the installation and removal of the circuit board 300 is facilitated. The box 10a can prevent the circuit board 300 from contacting the electrode assembly 200 and the electrolyte, thereby reducing the risk of the circuit board 300 being short-circuited due to contact with the battery cells 1, and at the same time reducing the interference of the battery cells 1 on the circuit board 300.

In some embodiments, as shown in Figure 1, the electrical device includes the above-mentioned battery 100a. Such an arrangement can reduce the number of openings on the outer casing of the battery cell to increase its strength, reduce the risk of structural strength failure, simplify the process and save costs; further, it can also reduce the space occupied by the openings and improve Compact structure.

To sum up, the embodiments of the present application can install multiple connecting parts for insulating connections that block the mounting hole through the same mounting hole on the housing, that is, the installation of multiple connecting parts for insulating connections can be achieved through one mounting hole. Ability to reduce the number of mounting holes on the housing. On the one hand, since the strength of the casing will decrease as the number of mounting holes increases, the above structure can increase the strength of the casing and reduce the risk of structural strength failure of the battery cells; on the other hand, the sealing performance of the casing will also decrease with the increase in the number of mounting holes. decreases with the increase in the number of mounting holes, so the above structure can also improve the sealing performance of the shell; on the other hand, because the connecting column corresponding to each mounting hole needs to be installed at the corresponding mounting hole, that is, it needs to be fixedly connected to the shell. As the number of mounting holes increases, the complexity of the battery cell process will also increase. For example, it is necessary to process a step surface for each mounting hole on the casing, which is costly. Therefore, the above structure can also reduce the process of the battery cell. complexity and cost savings. Furthermore, integrating multiple connecting parts of the insulation connection into the same mounting hole can reduce the area occupied by the mounting holes on the housing compared to providing independent mounting holes without connecting parts, thereby improving the compactness of the structure. sex.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application. The scope shall be covered by the claims and description of this application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any way. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (19)

1. A battery cell, comprising at least:

the shell comprises a wall part, wherein the wall part is provided with a mounting hole for communicating the inside and the outside of the shell;

a sampling assembly housed inside the housing;

and the plurality of connecting parts are in insulating connection and are arranged in the mounting hole and are used for blocking the mounting hole, and the plurality of connecting parts are electrically connected with the sampling assembly.

2. The battery cell of claim 1, wherein the plurality of connection portions includes a first connection portion disposed along a predetermined axis and a second connection portion circumferentially surrounding at least a portion of an outer circumference of the first connection portion along a circumference of the first connection portion.

3. The battery cell of claim 2, wherein the second connection portion is closed around the outer periphery of the first connection portion.

4. The battery cell according to claim 2, wherein the number of the second connection parts is at least two, and at least two of the second connection parts are disposed at intervals along the circumferential direction of the first connection part.

5. The battery cell of claim 1, wherein the connection portion is disposed partially around a predetermined axis, and the plurality of connection portions are spaced apart from each other along a circumference of the predetermined axis.

6. The battery cell of any one of claims 1 to 5, further comprising:

and the insulating piece is arranged among the plurality of connecting parts.

7. The battery cell of any one of claims 1 to 5, further comprising a securing member to which the connecting portion is secured, the securing member fixedly connecting the wall portion.

8. The battery cell as recited in claim 7, wherein the securing member is secured around the outer periphery of the connecting portion at least partially along the circumference of the connecting portion.

9. The battery cell of claim 7, wherein the mounting hole includes a first hole section and a second hole section in communication with each other, the first hole section in communication with the exterior of the housing, the second hole section in communication with the interior of the housing, the first hole section and the second hole section forming a stepped surface at a junction of the two toward the exterior of the housing, the fixture supported on the stepped surface.

10. The battery cell of claim 9, wherein the mount comprises: the fixed section and the inserting section are arranged along the preset axis direction, the inserting section is arranged in the second hole section, and the fixed section is arranged in the first hole section and is supported on the step surface.

11. The battery cell of claim 10, wherein the battery cell further comprises:

the sealing ring is arranged between the fixed section and the step surface.

12. The battery cell of claim 1, wherein the housing comprises a shell and an end cap, the shell being provided with an open end, the end cap being capped at the open end, the sampling assembly being housed within the shell; the end cap forming the wall portion; the mounting hole is formed in the end cover.

13. The battery cell of claim 1, wherein the sampling assembly comprises a plurality of sampling modules, each sampling module coupled to at least one of the connections.

14. The battery cell of claim 1, wherein the battery cell further comprises:

and the circuit board is arranged outside the shell and is electrically connected with the connecting part.

15. The battery cell of claim 14, wherein the circuit board is disposed on a side of the wall portion facing away from the sampling assembly.

16. A battery comprising a cell according to any one of claims 1 to 15.

17. The battery of claim 16, wherein the battery further comprises:

and the battery management unit is electrically connected with the connecting part.

18. The battery of claim 16, wherein the battery further comprises:

the battery monomer is arranged in the box body;

the circuit board is arranged outside the box body and is electrically connected with the connecting part.

19. An electrical device comprising a battery as claimed in any one of claims 16 to 18.