Battery cells, batteries and electrical devices

Abstract

The present invention provides a battery cell, a battery, and an electric device. The battery cell includes a housing, an electrode assembly, and a detection sensor. The housing includes a wall portion having a mounting hole that communicates the interior and exterior of the housing. The electrode assembly is housed inside the housing. The detection sensor includes a sampling module and a packaging case that is inserted at least partially into the mounting hole to close the mounting hole and package the sampling module. The sampling module is for sampling the environment inside the housing. The above means allows the overall volume of the battery cell to be reduced, contributing to an improvement in volumetric energy density.

Description

[Technical Field]

[0001] This application relates to the technical field of batteries, and in particular to battery cells, batteries and electrical devices. [Background technology]

[0002] With the development of battery technology, battery cells are finding more and more applications and are gradually replacing traditional petrochemical energy in the automotive power field. Battery cells can store chemical energy and controllably convert it into electrical energy. Recyclable battery cells can be recharged after discharge to activate the active materials for reuse.

[0003] Generally, a battery cell may include an electrode assembly, electrode poles, and a housing that can accommodate the electrode assembly. The electrode assembly is electrically connected to the outside via the electrode poles. In a conventional battery cell structure, the internal space of the housing is limited and compact. However, in order to ensure a high volumetric energy density, it is necessary to accommodate larger or more electrode assemblies in the limited internal space of the housing. This makes it difficult to arrange other components and also makes it difficult to obtain environmental information inside the housing, thereby restricting effective management of the operating state of the battery cell. Summary of the Invention

[0004] In view of the above problems, the present application provides a battery cell, a battery, and an electric device that can reduce the overall volume of the battery cell and contribute to improving the volumetric energy density of the battery cell.

[0005] In a first aspect, the present application provides a battery cell including a housing, an electrode assembly, and a detection sensor. The housing includes a wall portion having a mounting hole communicating between the interior and exterior of the housing. The electrode assembly is housed inside the housing. The detection sensor includes a sampling module and a packaging case for packaging the sampling module, at least a portion of which is inserted into the mounting hole to close the mounting hole. The sampling module is for sampling the environment inside the housing.

[0006] According to the above-described means, at least a portion of the packaging case is inserted into the mounting hole and occupies the space of the wall itself, thereby reducing the space occupied inside or outside the housing, contributing to a reduction in the overall volume and space occupied by the battery cell. Furthermore, the space occupied by the detection sensor inside the housing can be reduced, providing more space inside the housing for accommodating the electrode assembly, improving the space utilization rate inside the housing, increasing the volumetric energy density of the battery cell, and making the battery cell structure more compact. Meanwhile, by providing at least a portion of the detection sensor outside the housing or within the mounting hole, the distance between the sampling module and the electrode assembly can be increased, reducing the probability of the sampling module being corroded by the electrode assembly and the risk of a short circuit due to contact between the sampling module and the electrode assembly.

[0007] In some embodiments, a via is opened on the side of the packaging case facing the inside of the housing, and at least a portion of the sampling module is exposed through the via to sample the environment inside the housing.

[0008] According to the above means, the sampling module can obtain environmental information inside the housing through the vias, thereby effectively sampling the environment inside the housing and contributing to the management of the operating state of the battery cell by an external system. Meanwhile, the provision of the vias reduces the exposed area of ​​the sampling module, allowing the packaging case to effectively protect the sampling module, reducing the probability of damage or corrosion of the sampling module and improving the operating stability of the battery cell.

[0009] In some embodiments, the mounting hole includes a first hole portion and a second hole portion that communicate with each other, the first hole portion is closer to the interior of the housing than the second hole portion, and a support base surface facing the second hole portion is formed at the connection point between the first hole portion and the second hole portion. At least a portion of the packaging case is provided in the second hole portion and supported on the support base surface.

[0010] According to the above means, the support surface limits the movement of the packaging case into the housing, stabilizes the distance between the electrode assembly, and reduces the probability of a short circuit occurring between them. In addition, the second hole portion limits the movement range of the packaging case in the radial direction of the mounting hole, making it easier to mount the packaging case.

[0011] In some embodiments, the packaging case includes an insertion portion and a flange portion protruding from the outer periphery of the insertion portion, the flange portion being supported on the support base surface, and at least a portion of the insertion portion being inserted into the first hole portion.

[0012] According to the above means, the support base surface can limit the movement of the flange portion into the housing, the second hole portion can limit the movement range of the flange portion in the radial direction of the mounting hole, and the first hole portion can limit the movement range of the insertion portion in the radial direction of the mounting hole, thus making it easier to install the packaging case.

[0013] In some embodiments, the battery cell includes an isolation cover, which is located on the side of the wall portion facing the inside of the housing, has an isolation space and a through hole, and is configured to surround and cover the mounting hole, the isolation space and the mounting hole are configured opposite and communicate with each other, and the through hole communicates the isolation space with the inside of the housing.

[0014] According to the above means, the isolation cover separates the sampling module from the electrode assembly, thereby reducing the risk of a short circuit due to contact between the detection sensor and the electrode assembly, and reducing corrosive damage to the sampling module caused by the electrode assembly and corrosive damage to the sampling module caused by the electrolyte.

[0015] In some embodiments, the isolation cover is fixedly connected to the wall, or the battery cell includes a plastic member attached to the wall on the side facing the interior of the housing, and the isolation cover is fixedly connected to the plastic member.

[0016] According to the above-mentioned means, by fixedly connecting the isolation cover to the wall, the risk of the positional relationship between the isolation cover and the wall being destroyed is reduced, the connection stability between the isolation cover and the wall is improved, and the isolation cover can effectively protect the sampling module. By providing the isolation cover so that it is fixedly connected to the plastic member and effectively separating the wall from the electrode assembly, the influence of the electrode assembly and the electrolyte on the wall and elements in the wall (e.g., the circuit board and the sampling module, etc.) is reduced, the wall can be more effectively protected, and the isolation cover can be easily attached.

[0017] In some embodiments, the through-hole penetrates the bottom of the isolation cover and faces the sampling module, and / or the number of through-holes is multiple and the multiple through-holes are spaced apart.

[0018] According to the above-mentioned means, by arranging the through-hole opposite the sampling module, gas flows in through the through-hole and directly to the sampling module, shortening the airflow path and helping the sampling module to quickly and accurately acquire environmental information inside the housing.By providing multiple through-holes, the synchronization between the environment inside the housing and the environmental state around the sampling module can be increased, helping the sampling module to quickly and accurately acquire environmental information inside the housing.

[0019] In some embodiments, the battery cell further includes a circuit board disposed on a side of the wall opposite the interior of the housing, the detection sensor includes pins disposed on a side of the packaging case opposite the interior of the housing, and the sampling module is connected to the circuit board via the pins.

[0020] According to the above means, the circuit board can be easily attached and detached, the risk of short circuit due to contact between the circuit board and the electrode assembly is reduced, and corrosion of the circuit board by the electrode assembly and the electrolyte is reduced.

[0021] In some embodiments, the battery cell further includes a processor mounted on the circuit board and connected to the sampling module via pins.

[0022] According to the above means, the processor can process the environmental information sampled by the detection sensor, making it possible to make the battery cell intelligent. Furthermore, by providing the processor on the circuit board, the connection stability between the processor and the circuit board can be improved, thereby improving the connection stability between the processor and the detection sensor.

[0023] In some embodiments, the processor is located on the circuit board opposite the interior of the housing.

[0024] The above means contributes to heat dissipation from the processor.

[0025] In some embodiments, the detection sensor includes a modulation module mounted on the circuit board on the same side as the sampling module or on the opposite side of the circuit board from the sampling module.

[0026] According to the above means, by independently providing the modulation module and the sampling module on the circuit board, the degree of freedom in their installation is improved and the spatial occupation of the entire detection sensor can be optimized. This contributes to an improvement in volumetric energy density compared to when the modulation module and the sampling module are integrated and spatially interfere with the housing, electrode assembly, etc. Furthermore, by providing the modulation module on the circuit board, the connection stability between the modulation module and the circuit board can be improved, thereby improving the connection stability between the modulation module and the sampling module.

[0027] In some embodiments, the housing includes a case having an open end and accommodating the electrode assembly therein, and an end cover covering the open end, the end cover forming a wall portion, and the mounting hole opening in the end cover.

[0028] According to the above means, by opening the mounting hole in the end cover, it is easy to close the mounting hole. By providing the detection sensor in the end cover, it is easy to mount the detection sensor.

[0029] In some embodiments, the battery cell includes two electrode posts arranged at a distance from each other and drilled into the end cover, and the circuit board is electrically connected to the two electrode posts, so that the electrode assembly supplies power to the circuit board via the two electrode posts.

[0030] According to the above-mentioned means, the end cover can serve to fix the positions of the two electrode posts. The two electrode posts may be fixed to the end cover. By providing the circuit board on the wall portion, the space utilization rate of the wall portion can be increased, and the compactness of the battery cell structure can be improved.

[0031] In some embodiments, the detection sensor is a barometric pressure sensor, a gas sensor, or a temperature sensor.

[0032] According to the above means, by using an air pressure sensor as the detection sensor, the air pressure inside the housing can be detected, by using a gas sensor as the detection sensor, the type and / or concentration of one or more gases inside the housing can be detected, and by using a temperature sensor as the detection sensor, the temperature inside the housing can be detected, thereby contributing to management of the operating state of the battery cell.

[0033] In a second aspect, the present application provides a battery including the battery cell described above.

[0034] In a third aspect, the present application provides an electrical device comprising the battery described above.

[0035] The above description is merely a brief description of the technical solution of the present application. In order to make the technical solution of the present application more clearly understood and implemented according to the contents of the specification, and to make the above and other objectives, features and advantages of the present application more comprehensible, specific embodiments of the present application are given below. [Brief explanation of the drawings]

[0036] Various other benefits and advantages will become apparent to those skilled in the art upon review of the detailed description of the preferred embodiments below. The drawings are only for purposes of illustrating the preferred embodiments and should not be construed as limiting the present application. Also, like reference numerals refer to like elements throughout the drawings. A description of the drawings follows.

[0037] [Figure 1] 1 is a structural diagram of a vehicle according to one or more embodiments. [Figure 2] FIG. 1 is an exploded structural schematic diagram of a battery according to one or more embodiments. [Figure 3] FIG. 1 is an exploded structural schematic diagram of a battery cell according to one or more embodiments. [Figure 4] FIG. 4 is a schematic diagram of the top surface structure of the battery cell shown in FIG. [Figure 5] FIG. 2 is a schematic block diagram of a circuit structure of a battery cell according to one or more embodiments. [Figure 6] 6 is a structural schematic diagram of the circuit board, the detection sensor, and the processor shown in FIG. 5. [Figure 7] 5 is a schematic diagram of the local structure of a cross section taken along the cutting line BB of the battery cell shown in FIG. 4. [Figure 8] 6 is another structural schematic diagram of the circuit board, the detection sensor, and the processor shown in FIG. 5. [Figure 9] FIG. 4 is a schematic diagram of a portion of the battery cell shown in FIG. 3. [Figure 10] 10 is a schematic diagram illustrating the process of attaching the detection sensor shown in FIG. 9. [Figure 11] FIG. 2 is another partial structural schematic diagram of a battery cell according to one or more embodiments. [Figure 12] 12 is a schematic diagram of the underside structure of a partial structure of the battery cell shown in FIG. 11. [Figure 13] 12 is a schematic diagram of the top structure of a partial structure of the battery cell shown in FIG. 11. [Figure 14] 14 is a schematic cross-sectional view of a partial structure of the battery cell shown in FIG. 13 taken along the cutting line AA. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0038] The following detailed description will be given of the embodiments of the technical proposal of the present application with reference to the drawings. The following embodiments are merely examples, and should not be construed as limiting the scope of protection of the present application, as they are merely intended to more clearly illustrate the technical proposal of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein are for describing specific examples only and are not intended to limit this application. The terms "comprises" and "comprises" and any variations thereof in the specification, claims, and the above brief description of the drawings of this application are intended to cover a non-exclusive inclusion.

[0040] In the description of the examples of this application, technical terms such as "first," "second," etc. are merely used to distinguish different objects, and should not be understood as indicating or implying relative importance, or implying the number, specific order, or primary and secondary relationship of the technical features shown. In the description of the examples of this application, unless otherwise clearly and specifically limited, "plurality" means two or more.

[0041] When an "embodiment" is described herein, it means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an embodiment that is exclusively independent of or an alternative to other embodiments. It is explicitly or implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the examples of this application, the term "and / or" is merely used to explain the relationship between related objects, and means that there may be three types of relationship; for example, A and / or B can mean that A exists alone, that A and B exist simultaneously, or that B exists alone. In addition, the symbol " / " in this specification generally means that the related objects before and after it are in an "or" relationship.

[0043] In describing the examples of this application, the term "plurality" refers to two or more (including two); similarly, "sets" refers to two or more (including two sets); and "plurality" refers to two or more (including two).

[0044] In describing the examples of the present application, orientations or positional relationships indicated by technical terms such as "center," "longitudinal direction," "lateral direction," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are orientations or positional relationships shown based on the drawings, and are intended merely to make the examples of the present application easier to explain and simplify the description. They do not explicitly or implicitly indicate that the indicated devices or elements necessarily have a specific orientation, or are configured and operated in a specific orientation, and therefore should not be understood as limiting the examples of the present application.

[0045] In describing the embodiments of the present application, unless otherwise clearly defined or limited, technical terms such as "attach," "couple," "connect," and "fix" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection. They may also refer to a mechanical connection or an electrical connection. They may also refer to a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in the embodiments of the present application according to specific circumstances.

[0046] With the development of battery technology, battery cells are finding more and more applications and are gradually replacing traditional petrochemical energy in the automotive power field. Battery cells can store chemical energy and controllably convert it into electrical energy. Recyclable battery cells can be recharged after discharge to activate the active materials for reuse.

[0047] A battery cell typically includes an electrode assembly, electrode poles, and a housing capable of housing the electrode assembly. The electrode assembly is electrically connected to the outside via the electrode poles. In conventional battery cell structures, the housing has a limited and compact interior space. To ensure a high volumetric energy density, however, it is necessary to accommodate larger or more electrode assemblies within the limited interior space of the housing. This makes it difficult to accommodate other components and obtain information about the environment within the housing, which is detrimental to effective management of the operating status of the battery cell. In related art, a detection sensor is provided within the housing to detect the environment within the housing. However, the detection sensor necessarily occupies space within the housing and further takes up space for the electrode assembly, which is detrimental to improving the volumetric energy density of the battery cell.

[0048] To reduce the space occupied by the detection sensor and improve the volumetric energy density of the battery cell, at least a portion of the packaging case is inserted into the mounting hole. Since at least a portion of the packaging case occupies the space of the wall itself, less space is occupied inside or outside the housing, contributing to reducing the overall volume and space occupied by the battery cell. Furthermore, since the space occupied by the detection sensor inside the housing can be reduced, more space is provided inside the housing for accommodating the electrode assembly, improving the space utilization rate inside the housing, increasing the volumetric energy density of the battery cell, and making the battery cell structure more compact. A packaging case can be further provided to protect the sampling module. The packaging case can reduce damage to the sampling module caused by factors outside the housing. Meanwhile, the packaging case can separate the sampling module from the electrode assembly and electrolyte, thereby reducing corrosion of the sampling module caused by the electrolyte inside the housing and the electrode assembly, and reducing the risk of short circuits due to direct contact between the sampling module and the electrode assembly.

[0049] In consideration of the above, the present application provides a battery cell, a battery, and an electric device. The battery cell includes a housing, an electrode assembly, and a detection sensor. The housing includes a wall portion having a mounting hole communicating the interior and exterior of the housing. The electrode assembly is accommodated within the housing. The detection sensor includes a sampling module and a packaging case, at least a portion of which is inserted into the mounting hole to close the mounting hole and package the sampling module. The sampling module is for sampling the environment within the housing. This reduces the space occupied by the detection sensor within the housing, contributing to an improvement in the volumetric energy density of the battery cell. Meanwhile, by providing at least a portion of the detection sensor outside the housing or within the mounting hole, the distance between the sampling module and the electrode assembly can be increased, reducing the probability of the sampling module being corroded by the electrode assembly and the risk of a short circuit due to contact between the sampling module and the electrode assembly.

[0050] The battery cells, batteries, and electric devices disclosed in the embodiments of the present application can be used in various energy storage systems using batteries as power sources or batteries as energy storage elements. The electric devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric motorcycles, electric cars, boats, aircraft, etc. Here, the electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, and the airplanes may include airplanes, rockets, space shuttles, and spaceships.

[0051] In the following embodiment, for convenience of explanation, an electric device according to an embodiment of the present application is a vehicle 1000a.

[0052] Referring to FIG. 1 , the vehicle 1000a may be a fuel-powered vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a battery-powered vehicle, a hybrid vehicle, a range-extender vehicle, or the like. A battery 100a is provided inside the vehicle 1000a, and the battery 100a may be installed at the bottom, front, or rear of the vehicle 1000a. The battery 100a can be used to supply power to the vehicle 1000a, for example, the battery 100a can be used as an operating power source for the vehicle 1000a. The vehicle 1000a may further include a controller 200a and a motor 300a, and the controller 200a controls the battery 100a to supply power to the motor 300a, for example, for operating power needs required for starting, navigation, and driving the vehicle 1000a.

[0053] In some embodiments of the present application, the battery 100a can not only be the operating power source for the vehicle 1000a, but can also replace or partially replace fuel oil or natural gas as the driving power source for the vehicle 1000a to provide driving power for the vehicle 1000a.

[0054] In some embodiments, the battery 100a may be an energy storage device, including an energy storage container, an energy storage cabinet, or the like.

[0055] The battery 100a described in the embodiments of this application is a single physical module that includes one or more battery cells 1 to provide higher voltage and capacity.

[0056] In the embodiments of the present application, the battery cells 1 may be secondary batteries, which are battery cells 1 that can be reused by activating the active material by charging after discharging. Each battery cell 1 may also be a primary battery.

[0057] The battery cell 1 includes, but is not limited to, 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 metal hydride battery, a nickel cadmium battery, a lead acid battery, etc. The battery cell 1 may be cylindrical, flat, rectangular, or have other shapes.

[0058] In some embodiments, the battery 100a may be a battery module, and when there are multiple battery cells 1, the multiple battery cells 1 are arranged and fixed to form a battery module.

[0059] In some embodiments, referring to FIG. 2, the battery 100a may be a battery pack, which includes a box 10a and battery cells 1, and the battery cells 1 or battery modules are housed in the box 10a.

[0060] In some embodiments, the box 10a may be part of the chassis structure of the vehicle 1000a. For example, a portion of the box 10a may be at least a portion of the floor of the vehicle 1000a, or at least a portion of the cross members and side members of the vehicle 1000a.

[0061] Referring to FIG. 2 , the battery 100a includes a box 10a and battery cells 1 housed in the box 10a. The box 10a provides a storage space for the battery cells 1 and can have a variety of structures. In some embodiments, the box 10a may include a first portion 11a and a second portion 12a that, when stacked together, define a storage space for the battery cells 1. The second portion 12a may have a hollow structure with an open end, and the first portion 11a may have a plate-like structure. The first portion 11a may be stacked on the open side of the second portion 12a, thereby defining the storage space. Alternatively, the first portion 11a and the second portion 12a may also have a hollow structure with an open end, with the open side of the first portion 11a stacked on the open side of the second portion 12a. Of course, the box 10a formed by the first portion 11a and the second portion 12a may have various shapes, such as a cylindrical shape or a rectangular parallelepiped shape.

[0062] The battery 100a may include multiple battery cells 1, and the multiple battery cells 1 may be connected in series, parallel, or a mixed connection. A mixed connection refers to multiple battery cells 1 connected in both series and parallel. The multiple battery cells 1 may be directly connected in series, parallel, or a mixed connection, and then the integrated multiple battery cells 1 may be housed in the box 10a. Of course, the battery 100a may also be formed by first connecting multiple battery cells 1 in series, parallel, or a mixed connection to form a battery module, and then further connecting the multiple battery modules in series, parallel, or a mixed connection to integrate them and housed in the box 10a. The battery 100a may further include other structures, for example, the battery 100a may further include current collecting members to realize electrical connection between the multiple battery cells 1.

[0063] 3 and 4, a battery cell 1 refers to the smallest constituent unit of a battery. In this embodiment, a cylindrical battery cell 1 is taken as an example. As shown in FIGS. 3 and 4, the battery cell 1 includes a housing 100, an electrode assembly 200, and other functional components.

[0064] In some embodiments, the housing 100 is for packaging components such as the electrode assembly 200 and the electrolyte, etc. The housing 100 may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), an aluminum-plastic film, or the like.

[0065] The housing 100 may include an end cover 120 and a case 110. The end cover 120 is a member that fits over the opening of the case 110 and isolates the internal environment of the battery cell 1 from the external environment. The shape of the end cover 120 may be adapted to match the shape of the case 110, but is not limited to this. Optionally, the end cover 120 may be made of a material (e.g., aluminum alloy) with a certain degree of hardness and strength so as to be resistant to deformation when pressed or hit. This provides the battery cell 1 with increased structural strength and improved safety. The end cover 120 may be provided with functional components such as electrode posts 900. The electrode posts 900 are electrically connected to the electrode assembly 200 to output or input electrical energy to or from the battery cell 1. In some embodiments, the end cover 120 may further be provided with a pressure release mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold. The end cover 120 may be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may be further provided inside the end cover 120 to isolate the end cover 120 from the electrical connection members inside the case 110 and reduce the risk of short circuits. For example, the insulating member may be plastic, rubber, etc.

[0066] The case 110, together with the end cover 120, is a component that forms the internal environment of the battery cell 1. This internal environment can accommodate the electrode assembly 200, electrolyte, and other components. The case 110 and the end cover 120 may be separate components, with an opening 112 formed in the case 110. The internal environment of the battery cell 1 may be formed by overlaying the end cover 120 on the opening 112. Alternatively, the end cover 120 and the case 110 may be integrated, but this is not limited to this. Specifically, a common connection surface may be formed between the end cover 120 and the case 110 before other components are enclosed, and the end cover 120 may be overlaid on the case 110 when it is necessary to seal the interior of the case 110. The case 110 may have various shapes and sizes, such as a rectangular parallelepiped, cylindrical, or hexagonal prism. Specifically, the shape of the case 110 may be determined according to the specific shape and size of the electrode assembly 200. The case 110 may be made of a variety of materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like.

[0067] The electrode assembly 200 is a component that undergoes an electrochemical reaction in the battery cell 1. The case 110 may include one or more electrode assemblies 200.

[0068] In some embodiments, the electrode assembly 200 includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell 1, active ions (e.g., lithium ions) are inserted and removed between the positive electrode and the negative electrode. The separator, which is disposed between the positive electrode and the negative electrode, prevents short-circuiting between the positive and negative electrodes and allows the active ions to pass through.

[0069] 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 provided on at least one surface of the positive electrode current collector.

[0070] For example, the positive electrode current collector has two surfaces that face each other in the thickness direction of the positive electrode current collector, and the positive electrode active material is provided on either one or both of the two facing surfaces of the positive electrode current collector.

[0071] For example, the positive electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, sintered carbon, carbon, nickel, or titanium. The composite current collector may include a polymeric substrate layer and a metal layer. The composite current collector may be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, or silver alloy) on a polymeric substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene).

[0072] For example, the positive electrode active material may include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound thereof. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material may also be used. These positive electrode active materials may be used alone or in combination of two or more. Here, examples of the lithium-containing phosphate may include, but are not limited to, at least one of lithium iron phosphate (e.g., LiFePO4 (also abbreviated as LFP)), a lithium iron phosphate and carbon composite, lithium manganese phosphate (e.g., LiMnPO4), a lithium manganese phosphate and carbon composite, lithium manganese iron phosphate, and a lithium manganese iron phosphate and carbon composite. Examples of lithium transition metal oxides include lithium cobalt oxide (e.g., LiCoO), lithium nickel oxide (e.g., LiNiO), lithium manganese oxide (e.g., LiMnO, LiMnO), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel manganese cobalt oxide (e.g., LiNi 1 / 3 Co 1 / 3 Mn1 / 3 O2(NCM 333 (can also be abbreviated as LiNi 0.5 Co 0.2 Mn 0.3 O2(NCM 523 (can also be abbreviated as LiNi 0.5 Co 0.25 Mn 0.25 O2(NCM 211 (can also be abbreviated as LiNi 0.6 Co 0.2 Mn 0.2 O2(NCM 622 (can also be abbreviated as LiNi 0.8 Co 0.1 Mn 0.1 O2(NCM 811 Lithium nickel cobalt aluminum oxide (e.g., LiNi 0.85 Co 0.15 Al 0.05 O2)) and modified compounds thereof.

[0073] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0074] For example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, the metal foil may be silver-surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, sintered carbon, carbon, nickel, or titanium. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam. The composite current collector may include a polymer substrate layer and a metal layer. The composite current collector may be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, or silver alloy) on a polymer substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene).

[0075] For example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material provided on at least one surface of the negative electrode current collector.

[0076] For example, the negative electrode current collector has two surfaces that face each other in the thickness direction of the negative electrode current collector, and the negative electrode active material is provided on either one or both of the two facing surfaces of the negative electrode current collector.

[0077] For example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells 1. For example, the negative electrode active material may include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, and lithium titanate. The silicon-based material may be at least one selected from silicon elemental, silicon-oxygen compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be at least one selected from tin elemental, tin-oxygen compounds, and tin alloys. However, the present application is not limited to these materials, and other conventional materials usable as battery negative electrode active materials may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0078] In some embodiments, the material of the positive current collector may be aluminum and the material of the negative current collector may be copper.

[0079] In some embodiments, the electrode assembly 200 further includes a separator disposed between the positive electrode and the negative electrode.

[0080] In some embodiments, the separator is an isolating film. In the present application, the type of the isolating film is not particularly limited, and any known porous structure isolating film having good chemical stability and mechanical stability can be selected.

[0081] For example, the main material of the separator film may be at least one selected from glass fiber, nonwoven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator film may be a single-layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of each layer may be the same or different, and are not particularly limited. The separator may be located between the positive and negative electrodes as a separate component, or may be attached to the surface of the positive and negative electrodes.

[0082] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive and negative electrodes and serves to transport ions and separate the positive and negative electrodes.

[0083] In some embodiments, the battery cell 1 further includes an electrolyte, which serves to conduct ions between the positive electrode and the negative electrode. The present application does not specifically limit the type of electrolyte, and it can be selected as needed. The electrolyte may be liquid, gel, or solid.

[0084] Here, the liquid electrolyte includes an electrolyte salt and a solvent.

[0085] In some embodiments, the electrolyte salt may be at least one selected from lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium bisoxalate borate, lithium difluorobisoxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0086] In some embodiments, the solvent may be at least one selected from ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, ethyl methyl sulfone, and diethyl sulfone. The solvent may be an ether-based solvent. The ether-based solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ether.

[0087] Here, the gel electrolyte comprises a polymer-based electrolyte skeletal network in which an ionic liquid-lithium salt is incorporated.

[0088] Here, the solid electrolyte includes polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0089] By way of example, the polymer solid electrolyte may be polyether (polyoxyethylene), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, single ion polymer, polyionic liquid-lithium salt, cellulose, and the like.

[0090] By way of example, the inorganic solid electrolyte may be one or more of an oxide solid electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON thin film), a sulfide solid electrolyte (crystalline lithium superionic conductor (lithium germanium phosphate sulfur, argyrophile), amorphous sulfide), a halide solid electrolyte, a nitride solid electrolyte, and a hydride solid electrolyte.

[0091] For example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0092] In some embodiments, the electrode assembly 200 is a wound structure. The wound structure is formed by winding a positive electrode sheet and a negative electrode sheet.

[0093] In some embodiments, the electrode assembly 200 is provided with tabs 201 that allow current to be extracted from the electrode assembly 200. The tabs include a positive electrode tab and a negative electrode tab. The positive electrode tab and the negative electrode tab may both be located at the same end of the main body, or may be located at opposite ends of the main body. During the charge and discharge process of the battery 100a, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs 201 are connected to the electrode posts 900 to form a current circuit.

[0094] According to some embodiments of the present application, as shown in Figures 3 to 5, a battery cell 1 described in an embodiment of the battery cell 1 of the present application includes a housing 100, an electrode assembly 200, and a detection sensor 400. The housing 100 includes a wall portion 101 having a mounting hole 102 that communicates between the inside and outside of the housing 100. The electrode assembly 200 is accommodated inside the housing 100. The detection sensor 400 includes a sampling module 410 and a case 430 for packaging the sampling module 410, and at least a portion of the packaging case 430 is inserted into the mounting hole 102 to close the mounting hole 102. The sampling module 410 is for sampling the environment inside the housing 100.

[0095] During use of the battery cell 1, the interior of the housing 100 is constantly undergoing dynamic changes, such as the volume of the electrode assembly 200 expanding, the temperature and pressure inside the housing 100 changing, and gas generation inside the housing 100. The detection sensor 400 obtains information about the environment inside the housing 100, for example, sampling the gas, temperature, or air pressure inside the housing 100, thereby improving the effectiveness of management of the operating state of the battery cell 1 and improving the stability of the operation of the battery cell 1.

[0096] A change in the environment inside the housing 100 can cause a corresponding change in the mounting hole 102, so that the sampling module 410 can quickly and accurately obtain information about the environment inside the housing 100 through the mounting hole 102. For example, if the temperature inside the housing 100 increases, heat can be transferred to the mounting hole 102. For example, if the air pressure inside the housing 100 increases, the air pressure inside the mounting hole 102 will also increase accordingly, or if the gas concentration inside the housing 100 changes, the gas concentration inside the mounting hole 102 will also change accordingly.

[0097] At least a portion of the packaging case 430 is inserted into the mounting hole 102, and at least a portion of the packaging case 430 occupies the space of the wall portion 101 itself, so that the space occupied inside or outside the housing 100 is reduced, which contributes to reducing the overall volume and occupied space of the battery cell 1.

[0098] In some embodiments, the sampling module 410 is provided in the mounting hole 102, and by opening the mounting hole 102 in the wall 101, environmental information about the interior of the housing 100 acquired by the sampling module 410 can be transmitted to a member outside the housing 100, making it easier to manage the internal environment of the housing 100 from the outside. In another embodiment, the sampling module 410 is provided outside the housing 100, and the sampling module 410 can acquire environmental information about the interior of the housing 100 through the mounting hole 102.

[0099] Compared to providing the detection sensor 400 completely inside the housing 100, providing at least a portion of the detection sensor 400 outside the housing 100 or inside the mounting hole 102 can reduce the space occupied by the detection sensor 400 inside the housing 100, providing more space in the housing 100 for accommodating the electrode assembly 200, improving the space utilization rate inside the housing 100, increasing the volumetric energy density of the battery cell 1, and making the structure of the battery cell 1 more compact. On the other hand, providing at least a portion of the detection sensor 400 outside the housing 100 or inside the mounting hole 102 can increase the spacing between the sampling module 410 and the electrode assembly 200, reducing the probability that the sampling module 410 will be corroded by the electrode assembly 200 and reducing the risk of a short circuit due to contact between the sampling module 410 and the electrode assembly 200.

[0100] The packaging case 430 can protect the sampling module 410. The packaging case 430 can reduce damage to the sampling module 410 due to factors outside the housing 100, and can separate the sampling module 410 from the electrode assembly 200 and the electrolyte, thereby reducing corrosion of the sampling module 410 due to the electrolyte and electrode assembly 200 inside the housing 100 and reducing the risk of short circuits due to direct contact between the sampling module 410 and the electrode assembly 200.

[0101] The wall 101 can be fitted with a packaging case 430. The packaging case 430 can serve to mount the sampling module 410 to the wall 101. The provision of the packaging case 430 facilitates the mounting of the sampling module 410. During the design process of the battery cell 1, the dimensions and shape of the packaging case 430 can be adjusted to match the dimensions and size of the mounting hole 102, thereby reducing the overall dimensions of the detection sensor 400 and improving the space utilization rate of the battery cell 1.

[0102] By inserting at least a portion of the packaging case 430 into the mounting hole 102, the mounting hole 102 can limit the radial movement range of the packaging case 430, making it easier to mount the packaging case 430. By closing the mounting hole 102 with the packaging case 430, leakage of electrolyte inside the battery cell 1 through the mounting hole 102 can be restricted. Furthermore, the dimensions and shape of the packaging case 430 can be adapted to fit the mounting hole 102, and closing the mounting hole 102 with the packaging case 430 contributes to improving the sealing effect of the housing 100.

[0103] Furthermore, in the radial direction of the mounting hole 102, the portion of the packaging case 430 that is located within the mounting hole 102 can fill the mounting hole 102, thereby realizing the closing of the mounting hole 102.

[0104] According to some embodiments of the present application, optionally, as shown in FIG. 4, the packaging case 430 is fixed to the wall 101 by welding.

[0105] This arrangement contributes to a stable connection between the packaging case 430 and the wall 101, and on the other hand, by connecting the packaging case 430 and the wall 101 by welding, it is possible to seal the mounting hole 102. Furthermore, the packaging case 430 is made of a metal material.

[0106] Optionally, the welding operation can be performed from the side of the wall 101 opposite to the interior of the housing 100. A melt can be formed during the welding process, and the packaging case 430 and the wall 101 can be connected after the melt has hardened.

[0107] According to some embodiments of the present application, optionally, as shown in Figures 3, 4 and 6, a via 431 is opened on the side of the packaging case 430 facing the inside of the housing 100, and at least a portion of the sampling module 410 is exposed through the via 431 to sample the environment inside the housing 100.

[0108] The via 431 is opened on the side of the packaging case 430 facing the inside of the housing 100, which helps the sampling module 410 to quickly and accurately obtain information about the environment inside the housing 100. A change in the environment inside the housing 100 can cause a corresponding change in the via 431, so that the sampling module 410 can quickly and accurately obtain information about the environment inside the housing 100 through the via 431.

[0109] By providing the sampling module 410 so as to be exposed through the via 431, the sampling module 410 can face the inside of the housing 100, which helps the sampling module 410 quickly and accurately obtain environmental information inside the housing 100 and further helps an external system manage the operating state of the battery cell 1, improving the operational stability of the battery cell 1. Meanwhile, the dimensions of the via 431 are small, and providing the via 431 can reduce the exposed area of ​​the sampling module 410, so that the packaging case 430 can effectively protect the sampling module 410 and reduce the probability of the sampling module 410 being damaged or corroded.

[0110] 6 and 7, the mounting hole 102 optionally includes a first hole portion 103 and a second hole portion 104 that communicate with each other, the first hole portion 103 being closer to the interior of the housing 100 than the second hole portion 104, and a support base surface 105 facing the second hole portion 104 is formed at the connection point between the first hole portion 103 and the second hole portion 104. At least a portion of the packaging case 430 is disposed in the second hole portion 104 and supported by the support base surface 105.

[0111] The axial direction of the mounting hole 102 refers to the distance between one end of the mounting hole 102 facing the inside of the housing 100 and the other end opposite the inside of the housing 100, and the radial direction of the mounting hole 102 is perpendicular to the axial direction of the mounting hole 102.

[0112] The second hole 104 can be used to mount the packaging case 430. The support surface 105 can limit the movement of the packaging case 430 into the housing 100, and the second hole 104 can limit the radial movement range of the mounting hole 102 of the packaging case 430, which not only makes it easier to mount the packaging case 430 but also contributes to stabilizing the structure of the packaging case 430 after it is mounted.

[0113] Optionally, the packaging case 430 is partially located within the first hole 103 and partially located within the second hole 104 .

[0114] According to some embodiments of the present application, optionally, as shown in Figures 7 and 8, the packaging case 430 includes an insertion portion 432 and a flange portion 433 protruding from the outer periphery of the insertion portion 432, the flange portion 433 being supported by the support base surface 105, and at least a portion of the insertion portion 432 being inserted into the first hole portion 103.

[0115] The support base surface 105 can limit the movement of the flange portion 433 into the housing 100, the second hole portion 104 can limit the radial movement range of the mounting hole 102 of the flange portion 433, and the first hole portion 103 can limit the radial movement range of the mounting hole 102 of the insertion portion 432, thereby making it easier to install the packaging case 430.

[0116] Alternatively, the flange portion 433 and the wall portion 101 can be connected by welding. A melt can be formed during the welding process, and after the melt hardens, the flange portion 433 and the wall portion 101 can be connected. The welding operation can be performed from the flange portion 433 on the side opposite the interior of the housing 100. Furthermore, during the welding process, the melt can extend from the flange portion 433 and enter the side wall of the second hole portion 104 to connect the flange portion 433 and the wall portion 101. Alternatively, during the welding process, the melt can extend from the flange portion 433 on the side opposite the interior of the housing 100, through the flange portion 433, pass through the support base surface 105, and reach the wall portion 101 to connect the flange portion 433 and the wall portion 101.

[0117] Optionally, in the radial direction of the first hole portion 103, the portion of the packaging case 430 located within the first hole portion 103 can fill the first hole portion 103, thereby realizing the first hole portion 103 being blocked.

[0118] 7, 9, and 10, the battery cell 1 optionally includes an isolation cover 500, which is located on the side of the wall 101 facing the inside of the housing 100, has an isolation space 510 and a through-hole 520, and is configured to surround and cover the mounting hole 102, with the isolation space 510 and the mounting hole 102 facing each other and communicating with each other. The through-hole 520 connects the isolation space 510 to the inside of the housing 100. The isolation cover 500 is intended to separate the sampling module 410 and the electrode assembly 200.

[0119] The provision of the isolation cover 500 prevents the sampling module 410 from coming into direct contact with the electrode assembly 200, thereby reducing the risk of a short circuit occurring due to contact between the detection sensor 400 and the electrode assembly 200. Furthermore, the provision of the isolation cover 500 can reduce corrosive damage to the sampling module 410 caused by the electrode assembly 200. The isolation cover 500 also contributes to reducing contact between the electrolyte and the sampling module 410, thereby reducing corrosive damage to the sampling module 410 caused by the electrolyte.

[0120] The sampling module 410 can obtain environmental information inside the housing 100 through the through-hole 520. The provision of the through-hole 520 helps the sampling module 410 to quickly and accurately obtain environmental information inside the housing 100. For example, a change in pressure or temperature inside the housing 100 can cause a corresponding change in the isolated space 510 through the through-hole 520, and the related environmental information can then be detected by the sampling module 410. Furthermore, for example, when gas is generated inside the housing 100, the gas can be transmitted to the isolated space 510 and the mounting hole 102 through the through-hole 520 and then detected by the sampling module 410.

[0121] According to some embodiments of the present application, as shown in Figures 7, 9, and 10, the isolation cover 500 is optionally fixedly connected to the wall 101. This arrangement reduces the risk of the positional relationship between the isolation cover 500 and the wall 101 being damaged, improves the connection stability between the isolation cover 500 and the wall 101, and effectively protects the sampling module 410 from the isolation cover 500.

[0122] Alternatively, the battery cell 1 includes the electrode assembly 200 and a plastic member 600 located on the wall portion 101 , and the isolation cover 500 is attached to the plastic member 600 .

[0123] By providing the isolating cover 500 so that it is fixedly connected to the plastic member 600, installation of the isolating cover 500 is facilitated.

[0124] Optionally, the plastic member 600 is a plastic material, which aids in molding the plastic member 600 .

[0125] Furthermore, the plastic member 600 is an insulating material and can form insulation between the electrode assembly 200 and the wall 101, thereby restricting current from flowing directly from the electrode assembly 200 to the wall 101 or from the wall 101 to the electrode assembly 200.

[0126] Optionally, the plastic member 600 and the isolation cover 500 are integrally injection molded, which can reduce the steps in the manufacturing process of the battery cell 1.

[0127] According to some embodiments of the present application, optionally, as shown in FIGS. 6 and 7, a through-hole 520 is provided through the bottom of the isolation cover 500 and facing the sampling module 410.

[0128] Changes in the environment inside the housing 100 can cause changes in the ambient environment of the sampling module 410 through the through-hole 520. The bottom of the isolation cover 500 is closer to the inside of the housing 100. By arranging the through-hole 520 and the sampling module 410 opposite each other, the sampling module 410 can face the inside of the housing 100. This arrangement helps the sampling module 410 to quickly and accurately obtain information about the environment inside the housing 100.

[0129] Furthermore, the detection sensor 400 includes a gas sensor. By providing the through-hole 520 and the sampling module 410 opposite each other, the path along which gas flows from the inside of the housing 100 to the mounting hole 102 can be shortened.

[0130] Optionally, the number of through holes 520 is plural, and the through holes 520 are arranged at intervals.

[0131] Specifically, the plurality of through-holes 520 may be arranged in an array. For example, some of the plurality of through-holes 520 may be arranged in a circular array around other parts of the plurality of through-holes 520. Furthermore, for example, the plurality of through-holes 520 may be arranged in a rectangular array.

[0132] By opening multiple through-holes 520, the synchronization between the environment inside the housing 100 and the environment surrounding the sampling module 410 can be increased, for example, changes in pressure, temperature, or gas inside the housing 100 can cause rapid corresponding changes in the environment surrounding the sampling module 410 through the multiple through-holes 520, and the related environment information can then be detected by the sampling module 410, thereby helping the sampling module 410 to quickly and accurately obtain information about the environment inside the housing 100.

[0133] According to some embodiments of the present application, optionally, as shown in Figures 3, 4 and 6, the battery cell 1 further includes a circuit board 300 provided on the wall portion 101 opposite to the inside of the housing 100. The detection sensor 400 includes pins 401 provided on the packaging case 430 opposite to the inside of the housing 100, and the sampling module 410 is connected to the circuit board 300 via the pins 401.

[0134] Specifically, the pin 401 can extend from the interior of the packaging case 430 through the packaging case 430 to the opposite side of the packaging case 430 from the interior of the housing 100. The pin 401 can be connected to the sampling module 410 inside the packaging case 430.

[0135] Providing the circuit board 300 on the side of the wall 101 opposite the interior of the housing 100 makes it easy to attach and detach the circuit board 300. The wall 101 prevents contact between the circuit board 300 and the electrode assembly 200 or the electrolyte, thereby reducing the risk of a short circuit occurring due to contact between the circuit board 300 and the electrode assembly 200, and also reducing corrosion of the circuit board 300 by the electrode assembly 200 and the electrolyte.

[0136] Providing pins 401 to connect to circuit board 300 helps sampling module 410 transmit environmental information inside housing 100 to the outside of housing 100 .

[0137] Optionally, the packaging case 430 can be recessed into the mounting hole 102 on the side opposite to the interior of the housing 100, and the circuit board 300 can cover the mounting hole 102 on the side of the wall 101 opposite to the interior of the housing 100. This arrangement helps to securely connect the circuit board 300 to the wall 101.

[0138] According to some embodiments of the present application, optionally, as shown in Figures 5 and 6, the battery cell 1 further includes a processor 800 mounted on the circuit board 300 and connected to the sampling module 410 via pins 401.

[0139] By providing the processor 800 to connect to the sampling module 410 via the pin 401, the processor 800 can process the environmental information sampled by the detection sensor 400, thereby enabling the intelligence of the battery cell 1. For example, the processor 800 can determine the gas composition and concentration, temperature or air pressure inside the housing 100 based on the environmental information acquired by the detection sensor 400, and analyze the operating state of the battery cell 1.

[0140] Processor 800 may be an integrated circuit chip having signal processing capabilities. Processor 800 may also be a common 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, a discrete hardware component, etc. Common processors may be microprocessors or any general purpose processors.

[0141] For example, the processor 800 is an MCU. By providing the processor 800 on the circuit board 300, the connection stability between the processor 800 and the circuit board 300 can be improved, and the connection stability between the processor 800 and the detection sensor 400 can be improved.

[0142] According to some embodiments of the present application, optionally, processor 800 is located on the opposite side of circuit board 300 from the interior of housing 100, as shown in Figures 3, 4 and 6.

[0143] Since the space on the side of the circuit board 300 opposite the inside of the housing 100 is larger than the side facing the inside of the housing 100 of the circuit board 300, placing the processor 800 on the side of the circuit board 300 opposite the inside of the housing 100 contributes to heat dissipation of the processor 800.

[0144] According to some embodiments of the present application, optionally, as shown in FIG. 6, the detection sensor 400 includes a modulation module 420 that is mounted on the circuit board 300 so as to be located on the same side as the sampling module 410, or is mounted on the circuit board 300 so as to be located on the opposite side as the sampling module 410.

[0145] The sampling module 410 can acquire environmental information inside the housing 100 and output a sampling signal corresponding to the environmental information inside the housing 100. The sampling signal is generally an analog signal and is not suitable for applications such as data collection, process control, calculation, display, readout, etc. The modulation module 420 can convert the sampling signal into a digital signal so that the environmental information inside the housing 100 can be analyzed and processed.

[0146] It should be noted that the sampling signal is generally a very small voltage, current or change, and the modulation module 420 may include an amplifier circuit that can amplify the sampling signal before converting it into a digital signal in order to improve the accuracy when the sampling signal is converted into a digital signal.

[0147] Optionally, the modulation module 420 may further include a filter circuit that can perform low-pass filtering on the sampling signal to eliminate noise and prevent aliasing phenomena.

[0148] By providing the modulation module 420 on the circuit board 300, the connection stability between the modulation module 420 and the circuit board 300 can be improved, and the connection stability between the modulation module 420 and the sampling module 410 can be improved.

[0149] Mounting the modulation module 420 on the circuit board 300 on the same side as the sampling module 410 helps reduce the space occupied by the modulation module 420 and the sampling module 410. Mounting the modulation module 420 on the circuit board 300 on the opposite side as the sampling module 410 allows the circuit board 300 to protect the modulation module 420, improving the operational stability of the modulation module 420.

[0150] According to some embodiments of the present application, as optionally shown in Figures 3, 4, and 6, the housing 100 includes a case 110 having an open end 111 and accommodating the electrode assembly 200 therein, and an end cover 120 provided to cover the open end 111. The end cover 120 forms a wall portion 101. A mounting hole 102 is provided in the end cover 120.

[0151] The opening 112 may be formed in the open end 111. By forming the mounting hole 102 in the end cover 120, it becomes easy to close the mounting hole 102.

[0152] Providing the detection sensor 400 on the end cover 120 facilitates the installation of the detection sensor 400. The detection sensor 400 may be installed on the end cover 120 after the end cover 120 and the case 110 are connected. Alternatively, the detection sensor 400 may be installed on the end cover 120 before the end cover 120 and the case 110 are connected.

[0153] In another embodiment, the case 110 can form the wall portion 101. The mounting hole 102 can be opened in the case 110, for example, in the bottom wall of the case 110, with the bottom wall of the case 110 facing the open end 111. By providing the mounting hole 102 in this manner, the area in which the detection sensor 400 can be mounted can be increased.

[0154] 3 and 4, the battery cell 1 optionally includes two electrode posts 900 spaced apart and drilled into the end cover 120. The circuit board 300 is electrically connected to the two electrode posts 900, and the electrode assembly 200 supplies power to the circuit board 300 via the two electrode posts 900.

[0155] The end cover 120 can serve to fix the positions of the two electrode posts 900. The two electrode posts 900 may be fixed relative to the end cover 120.

[0156] Specifically, one end of the electrode pole 900 is arranged toward the inside of the housing 100 and can be electrically connected to the electrode assembly 200 arranged inside the housing 100, and the other end is arranged toward the outside of the housing 100 and can be connected to the outside and the circuit board 300, so that the electrode assembly 200 can supply power to the outside and the circuit board 300, respectively, via the electrode pole 900.

[0157] Furthermore, the electrode assembly 200 can be charged by the electrode pole 900 .

[0158] Furthermore, the two electrode pillars 900 may be a positive electrode pillar and a negative electrode pillar, respectively.

[0159] According to some embodiments of the present application, the detection sensor 400 is optionally an air pressure sensor, a gas sensor, or a temperature sensor.

[0160] The air pressure sensor can detect the air pressure inside the housing 100. The air pressure changes during the operation of the battery cell 1, for example, gas is generated inside the housing 100 or the temperature rises, causing the air pressure to rise rapidly. By using the air pressure sensor as the detection sensor 400, the air pressure inside the housing 100 can be detected, which contributes to managing the operating state of the battery cell 1.

[0161] The gas sensor can detect gas components within the housing 100, for example, H2, CO2, CO, or organic gases. Gases may be generated during the operation of the battery cell 1, for example, one or more of H2, CO, CO, and organic gases. By using the gas sensor as the detection sensor 400, the type and / or concentration of one or more gases within the housing 100 can be detected, which contributes to management of the operating state of the battery cell 1.

[0162] The temperature sensor can detect the temperature inside the housing 100. The temperature changes during the operation of the battery cell 1, for example, the temperature rises. By using the temperature sensor as the detection sensor 400, the temperature inside the housing 100 can be detected, which contributes to managing the operating state of the battery cell 1.

[0163] Optionally, the shape of the packaging case 430 is adapted to the shape of the mounting hole 102, so that the mounting hole 102 is used to mount and fix the packaging case 430. For example, as shown in Figures 11 to 14, the shapes of the packaging case 430 and the mounting hole 102 are both circular or elliptical. Furthermore, for example, the shapes of the packaging case 430 and the mounting hole 102 are both a combination of a rectangle and two semicircles, in which the two opposite sides of the rectangle and the diameters of the two semicircles are equal and connected.

[0164] According to some embodiments of the present application, as optionally shown in FIGS. 3 to 14 , the battery cell 1 includes a housing 100, an electrode assembly 200, and a detection sensor 400. The housing 100 includes a wall 101 having a mounting hole 102 that connects the interior and exterior of the housing 100. The housing 100 includes a case 110 having an open end 111 and housing the electrode assembly 200 therein, and an end cover 120 that covers the open end 111. The case 110 and / or the end cover 120 form the wall 101, and the mounting hole 102 is correspondingly opened in the case 110 and / or the end cover 120. The electrode assembly 200 is accommodated inside the housing 100. The detection sensor 400 includes a sampling module 410 and a packaging case 430 for packaging the sampling module 410, and at least a portion of the packaging case 430 is inserted into the mounting hole 102 to close the mounting hole 102. The sampling module 410 is used to sample the environment inside the housing 100. A via 431 is opened on the side of the packaging case 430 facing the inside of the housing 100, and at least a portion of the sampling module 410 is exposed through the via 431 to sample the environment inside the housing 100. The mounting hole 102 includes a first hole portion 103 and a second hole portion 104 that communicate with each other, the first hole portion 103 is closer to the inside of the housing 100 than the second hole portion 104, and a support base surface 105 facing the second hole portion 104 is formed at the connection point between the first hole portion 103 and the second hole portion 104. At least a portion of the packaging case 430 is provided in the second hole portion 104 and supported by the support base surface 105. The packaging case 430 includes an insertion portion 432 and a flange portion 433 protruding from the outer periphery of the insertion portion 432. The flange portion 433 is supported by the support base surface 105, and at least a portion of the insertion portion 432 is inserted into the first hole portion 103. The battery cell 1 includes an isolation cover 500. The isolation cover 500 is located on the side of the wall portion 101 facing the inside of the housing 100, and has an isolation space 510 and a through hole 520 formed therein. The isolation space 510 and the mounting hole 102 are opposite each other and communicate with each other.The through-hole 520 connects the isolated space 510 to the interior of the housing 100. The isolation cover 500 is fixedly connected to the wall 101. Alternatively, the battery cell 1 includes the electrode assembly 200 and a plastic member 600 located on the wall 101, and the isolation cover 500 is attached to the plastic member 600. The through-hole 520 penetrates the bottom of the isolation cover 500 and faces the sampling module 410. There are a plurality of through-holes 520, and the through-holes 520 are arranged at intervals. The battery cell 1 further includes a circuit board 300 provided on the side of the wall 101 opposite to the interior of the housing 100. The detection sensor 400 includes pins 401 provided on the side of the packaging case 430 opposite to the interior of the housing 100, and the sampling module 410 is connected to the circuit board 300 via the pins 401. The battery cell 1 further includes a processor 800 mounted on the circuit board 300 and connected to the sampling module 410 via pins 401. The processor 800 is mounted on the opposite side of the circuit board 300 from the interior of the housing 100. The detection sensor 400 includes a modulation module 420 mounted on the circuit board 300 on the same side as the sampling module 410, or on the circuit board 300 on the opposite side from the sampling module 410. The battery cell 1 includes two electrode posts 900 arranged at a distance from each other and drilled into the end cover 120. The circuit board 300 is electrically connected to the two electrode posts 900, so that the electrode assembly 200 supplies power to the circuit board 300 via the two electrode posts 900. The detection sensor 400 is an air pressure sensor, a gas sensor, or a temperature sensor.

[0165] 2, a battery 100a includes the above-described battery cell 1. By providing the battery 100a in this manner, the volumetric energy density of the battery cell 1 can be improved, thereby improving the volumetric energy density of the battery 100a.

[0166] According to some embodiments of the present application, an electric device includes the above-mentioned battery 100a, as shown in Figure 1. By providing it in this manner, the volumetric energy density of the battery 100a can be improved, thereby further improving the endurance capability of the electric device.

[0167] In summary, the embodiments of the present application can reduce the space occupied by the detection sensor 400 inside the housing 100, thereby providing more space in the housing 100 for accommodating the electrode assembly 200, improving the space utilization rate inside the housing 100 and increasing the volumetric energy density of the battery cell 1, resulting in a more compact structure for the battery cell 1. By providing at least a portion of the detection sensor 400 outside the housing 100 or within the mounting hole 102, the spacing between the sampling module 410 and the electrode assembly 200 can be increased, reducing the probability that the sampling module 410 will be corroded by the electrode assembly 200 and reducing the risk of a short circuit due to contact between the sampling module 410 and the electrode assembly 200.

[0168] Finally, it should be noted that the above embodiments are merely intended to illustrate the technical proposals of the present application and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical proposals described in the above embodiments may be modified or equivalently substituted for some or all of their technical features, and that such modifications or substitutions do not deviate from the essence of the corresponding technical proposals and the scope of the technical proposals of the embodiments of the present application, and are all within the scope of the claims and the description of the present application. In particular, as long as there is no structural contradiction, any technical features described in the embodiments may be arbitrarily combined. The present application is not limited to the specific embodiments disclosed herein, but includes all technical proposals encompassed within the scope of the claims. [Explanation of symbols]

[0169] 1000a vehicle 100a battery 200a controller 300a motor 10a Box 11a Part 1 12a 2nd part 1 battery cell 100 Housing 101 Wall section 102 Mounting hole 103 1st hole 104 2nd hole 105 Support surface 110 cases 111 Open end 112 Aperture 120 End cover 200 electrode assembly 201 tabs 300 Circuit Boards 400 detection sensor 401 pins 410 Sampling Module 420 Modulation Module 430 Packaging Case 431 Beer 432 Insertion part 433 Flange 500 isolation cover 510 Isolated space 520 Through hole 600 Plastic parts 800 processors 900 electrode pillar

Claims

1. a housing including a wall portion having a mounting hole that communicates between the inside and the outside; an electrode assembly housed inside the housing; a detection sensor including a sampling module for sampling an environment inside the housing, and a packaging case at least a portion of which is inserted into the mounting hole to close the mounting hole and for packaging the sampling module; A battery cell comprising:

2. a via hole is formed in the packaging case on a side facing the inside of the housing, and at least a portion of the sampling module is exposed through the via hole to sample the environment inside the housing; The battery cell according to claim 1 .

3. The mounting hole includes a first hole portion and a second hole portion that communicate with each other, the first hole portion is closer to the inside of the housing than the second hole portion, a support base surface facing the second hole portion is formed at a connection point between the first hole portion and the second hole portion, and at least a portion of the packaging case is provided in the second hole portion and supported by the support base surface.

3. The battery cell according to claim 1 or 2.

4. The packaging case includes an insertion portion and a flange portion protruding from an outer periphery of the insertion portion, the flange portion being supported on the support base surface, and at least a portion of the insertion portion being inserted into the first hole portion. The battery cell according to claim 3 .

5. The battery cell includes an isolation cover, the isolation cover is located on a side of the wall portion facing the inside of the housing, the isolation cover has an isolation space and a through hole, and is configured to surround and cover the mounting hole, the isolation space and the mounting hole are configured to face each other and communicate with each other, and the through hole communicates the isolation space with the inside of the housing. The battery cell according to any one of claims 1 to 4.

6. the isolation cover is fixedly connected to the wall; or The battery cell includes a plastic member located on the electrode assembly and the wall portion, and the isolation cover is provided on the plastic member. The battery cell according to claim 5 .

7. the through-hole penetrates the bottom of the isolation cover and is provided facing the sampling module, and / or the number of the through-holes is plural, and the plural through-holes are arranged at intervals.

7. The battery cell according to claim 5 or claim 6.

8. the battery cell further includes a circuit board provided on the wall portion on the opposite side of the housing from the inside thereof, the detection sensor includes a pin provided on the packaging case on the opposite side of the housing from the inside thereof, and the sampling module is connected to the circuit board via the pin. The battery cell according to any one of claims 1 to 7.

9. the battery cell further includes a processor mounted on the circuit board and connected to the sampling module via the pins; The battery cell according to claim 8 .

10. the processor is provided on the circuit board on the opposite side to the interior of the housing; The battery cell according to claim 9 .

11. The detection sensor includes a modulation module that is provided on the circuit board so as to be located on the same side as the sampling module, or is provided on the circuit board so as to be located on the opposite side as the sampling module. The battery cell according to any one of claims 8 to 10.

12. the housing includes a case having an open end and accommodating the electrode assembly therein, and an end cover provided to cover the open end, the end cover forming the wall portion, and the mounting hole being opened in the end cover; The battery cell according to any one of claims 8 to 11.

13. The battery cells include two electrode posts that are arranged at intervals, drilled into the end cover, and electrically connected to the circuit board, and the electrode assembly supplies power to the circuit board via the two electrode posts. The battery cell according to claim 12 .

14. The detection sensor is an air pressure sensor, a gas sensor, or a temperature sensor. The battery cell according to any one of claims 1 to 13.

15. A battery comprising the battery cell of any one of claims 1 to 14.

16. An electrical device comprising the battery of claim 15.

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