Gas sensor, battery cell, battery and gas concentration measurement method

Abstract

Provided are a gas sensor (300), a battery cell (1), a battery (100a) and a gas concentration measurement method. The gas sensor (300) comprises a base (310), an air pressure module (320) and a gas-sensitive module (330). The air pressure module (320) is arranged on the base (310) and used for measuring the air pressure in an environment. The gas-sensitive module (330) is arranged on the base (310), is spaced apart from the air pressure module (320), and is used for measuring the gas concentration of a preset gas in the environment under the air pressure. The arrangement of the gas sensor (300) can improve the measurement accuracy of the gas sensor (300).

Description

Gas sensor, battery cell, battery and gas concentration detection method

[0001] This application claims priority to Chinese patent application No. 2023110805716, filed on August 25, 2023, entitled “Gas sensor, battery cell, battery and gas concentration detection method,” the entire contents of which are incorporated herein by reference.

Technical field

[0002] The present application relates to the field of battery technology, and in particular to a gas sensor, a battery cell, a battery, and a gas concentration detection method. [Background Technology]

[0003] A gas sensor is a converter that converts information such as the composition and concentration of a certain gas into a corresponding electrical signal. Gas sensors also have significant advantages such as high precision, good selectivity, good stability, less interference from environmental factors, and long life. Therefore, gas sensors are widely used in coal mining, petroleum, chemical industry, medical treatment, transportation and other fields. In recent years, they have been widely used in the new energy battery industry.

[0004] However, existing gas sensors are easily affected by environmental factors (such as air pressure, etc.), resulting in inaccurate measurement results.

[0005] [Summary of the invention]

[0006] In view of the above problems, the present application provides a gas sensor, a battery cell, a battery and a gas concentration detection method, which can improve the detection accuracy of the gas sensor.

[0007] In a first aspect, the present application provides a gas sensor comprising a base, an air pressure module, and a gas sensing module. The air pressure module is disposed on the base and is used to detect the air pressure in an environment. The gas sensing module is disposed on the base and spaced apart from the air pressure module and is used to detect the gas concentration of a predetermined gas at a predetermined pressure in the environment.

[0008] In the technical solution of the embodiment of the present application, an air pressure module and a gas sensitive module are set in the gas sensor, so that the gas sensor can measure the air pressure in the measured space and the corresponding gas concentration under the air pressure, and can calculate the actual gas concentration based on the air pressure and the corresponding gas concentration under the air pressure. In this way, the air pressure can be included in the influence of the measurement result of the gas concentration, which facilitates the modification of the gas concentration, thereby improving the detection accuracy of the gas sensor.

[0009] In some embodiments, the air pressure module includes a first resistor element, a second resistor element, a third resistor element, and a fourth resistor element disposed on a base. The first end of the first resistor element is connected to the first end of the third resistor element, the second end of the first resistor element is connected to the first end of the second resistor element, the second end of the third resistor element is connected to the first end of the fourth resistor element, and the second end of the second resistor element is connected to the second end of the fourth resistor element. The air pressure module includes a first power supply terminal, a second power supply terminal, a first signal terminal, and a second signal terminal disposed on the base. The first power supply terminal is electrically connected to the first end of the first resistor element. The second power supply terminal is electrically connected to the second end of the second resistor element. The first signal terminal is electrically connected to the second end of the first resistor element, and the second signal terminal is electrically connected to the second end of the third resistor element. The resistance values ​​of the first resistor element, the second resistor element, the third resistor element, and the fourth resistor element are equal, and at least one of them is a piezoresistor.

[0010] Through the above settings, the air pressure module can form a Wheatstone bridge circuit. The Wheatstone bridge circuit has the characteristics of high measurement accuracy and high sensitivity. Therefore, the use of the Wheatstone bridge circuit can improve the measurement accuracy and measurement sensitivity of the air pressure module.

[0011] In some embodiments, the first power supply terminal, the second power supply terminal, the first signal terminal, and the second signal terminal are spaced apart and arranged on the same side of the base.

[0012] The above arrangement can facilitate the connection of the first power supply terminal, the second power supply terminal, the first signal terminal and the second signal terminal with the external circuit, thereby facilitating the wiring arrangement of the gas sensor.

[0013] In some embodiments, the air pressure module has a plurality of first connection terminals, and the air sensing module has a plurality of second connection terminals. The plurality of first connection terminals are spaced apart on one side of the base, and the plurality of second connection terminals are spaced apart on the other side of the base.

[0014] By arranging the plurality of first connection terminals and the plurality of second connection terminals on two different sides of the base, the plurality of first connection terminals and the plurality of second connection terminals are less likely to interfere with each other, and the wiring arrangement of the gas sensor is also facilitated.

[0015] In some embodiments, one side of the base and the other side of the base are disposed opposite to each other. Alternatively, one side of the base and the other side of the base are connected to each other and are disposed at an angle.

[0016] By arranging the first connection terminal and the second connection terminal on different sides of the base, wiring arrangement of the gas sensor can be facilitated.

[0017] In some embodiments, the gas sensing module includes a gas sensing resistor element, which includes a middle detection section and two side detection sections, wherein the middle detection section is connected between the two side detection sections, and the two side detection sections are connected to the middle detection section in a bent manner.

[0018] By providing a plurality of detection sections, the detection area of ​​the gas sensing module can be increased, so that the gas to be detected can be detected in a larger range, thereby improving the detection accuracy of the gas sensing module.

[0019] In some embodiments, the two side detection sections extend away from the air pressure module.

[0020] By extending the two side detection sections away from the air pressure module, the influence of the air pressure module on the side detection sections can be reduced, making it less likely for the air pressure module to interfere with the detection of the gas sensing module, thereby improving the detection accuracy of the gas sensing module.

[0021] In some embodiments, the gas sensing module includes two first detection terminals disposed on the base, and the two first detection terminals are disposed at ends of the two side detection sections away from the middle detection section.

[0022] By setting two first detection terminals on the two side detection segments, the gas sensing module can detect the resistance changes of the side detection segments and the middle detection segment through the two first detection terminals, thereby obtaining the composition and concentration of the preset gas through the resistance changes of the side detection segments and the middle detection segment, thereby improving the detection accuracy of the gas sensing module.

[0023] In some embodiments, the gas sensing module includes two second detection terminals disposed on the base, the two second detection terminals being disposed at ends of the two side detection segments away from the middle detection segment. At the same end of the gas sensing resistor element, the first detection terminal and the second detection terminal are staggered.

[0024] By providing two second detection terminals, the two first detection terminals and the two second detection terminals can form a four-wire method. Using the four-wire method to detect the gas-sensitive resistor element can improve the detection accuracy of the gas sensing module.

[0025] In some embodiments, the end of each side detection segment includes two branch segments that are connected to each other and branched, and the first detection terminal and the second detection terminal are respectively provided on the two branch segments.

[0026] By arranging the first detection terminal and the second detection terminal in different branch sections, so that the two first detection terminals and the two second detection terminals are connected to different endpoints, the gas sensor element can be measured more effectively and accurately.

[0027] In some embodiments, the preset gas includes hydrogen, and the material of the gas-sensitive resistor element includes at least one of palladium, nickel, platinum, a palladium alloy, a nickel alloy, and a platinum alloy.

[0028] Through the above-mentioned configuration, the gas sensor can detect whether the environment contains hydrogen through the gas-sensing module, and can further detect the concentration of hydrogen. Using materials such as palladium, nickel, platinum, palladium alloys, nickel alloys, and platinum alloys as the material of the gas-sensitive resistor element allows hydrogen to chemically react with the gas-sensitive resistor element, thereby enabling the gas sensor to more sensitively detect the presence of hydrogen and more accurately detect the concentration of hydrogen. Furthermore, the response speed of the gas sensor can be increased, and the gas-sensitive resistor element can operate stably and long-term.

[0029] In some embodiments, the air pressure module includes a first lining layer, a second lining layer, an electrode layer and a sensitive layer. The first lining layer is arranged on the base, the electrode layer is arranged on the side of the first lining away from the base, and the second lining layer is connected to the first lining layer to enclose a storage space for accommodating the sensitive layer and the electrode layer. The sensitive layer and the electrode layer are arranged opposite to each other.

[0030] Through the above arrangement, when the gas pressure acts on the second lining layer to act on the sensitive layer and the sensitive layer is deformed by the pressure, the capacitance that can be formed between the sensitive layer and the electrode layer changes. The measuring circuit can output an electrical signal that has a certain relationship with the voltage, thereby measuring the change in gas pressure, more effectively improving the measurement accuracy of the gas sensor, and also improving the stability and reliability of the pressure sensor.

[0031] In some embodiments, the air pressure module includes an anti-corrosion film layer, which is deposited by vapor deposition and covers the outer surface of the first lining layer and covers the joint between the first lining layer and the second lining layer.

[0032] By applying an anti-corrosion film on the outer surface of the first lining and in the seam between the first and second linings, the corrosion resistance of the air pressure module can be improved. This prevents other substances, such as electrolyte, from entering the containment space and potentially affecting the capacitance formed between the sensitive and electrode layers, or even damaging them, thereby enhancing the reliability and stability of the air pressure module. Furthermore, applying the anti-corrosion film by deposition allows for easy adjustment of its thickness, simplifies the process, and does not affect other components of the air pressure module.

[0033] In some embodiments, the air pressure module includes an adhesive layer bonded between the first lining layer and the second lining layer, and the anti-corrosion film layer covers the adhesive layer and a bonding gap between the adhesive layer, the first lining layer and the second lining layer.

[0034] By setting the adhesive layer between the first lining layer and the second lining layer, other substances such as electrolyte are prevented from entering the accommodation space to affect or corrode the sensitive layer and the electrode layer, thereby protecting the sensitive layer and the electrode layer and improving the reliability of the air pressure module.

[0035] In some embodiments, a side of the electrode layer facing the sensitive layer is higher than a side of the adhesive layer facing the second liner.

[0036] Through the above setting, the sensitive layer can be more easily moved closer to the electrode layer under the action of air pressure, so that the electrode layer can more easily detect the change in capacitance, thereby making the detection of the air pressure module more sensitive and the detection result more accurate.

[0037] In a second aspect, the present application provides a battery cell comprising a housing, an electrode assembly, and the gas sensor of the above-described embodiment. The electrode assembly is disposed within the housing. The gas sensor is disposed within the housing to detect gas and / or gas pressure within the housing.

[0038] By disposing the gas sensor in the above embodiment inside the housing of the battery cell, the gas pressure and gas concentration inside the housing of the battery cell can be accurately detected, thereby improving the accuracy of gas detection inside the housing of the battery cell.

[0039] In some embodiments, the battery cell includes a processor coupled to the air pressure module and the gas sensing module. The processor is configured to receive a gas concentration and air pressure, obtain a concentration compensation value that matches the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

[0040] The processor calculates the air pressure to obtain a concentration compensation value that matches the air pressure, and uses the concentration compensation value to compensate for the gas concentration to obtain a corrected gas concentration, thereby solving the impact of air pressure changes on gas detection and reducing the error of gas detection. It can solve the problem of the impact of air pressure changes inside the shell of the battery cell on gas detection and improve the accuracy of gas detection inside the shell of the battery cell.

[0041] In some embodiments, the processor is configured to determine a concentration compensation value that matches the air pressure on a preset concentration compensation curve. The preset concentration compensation curve is configured to represent a correspondence between the air pressure and the concentration compensation value.

[0042] By determining the concentration compensation value that matches the air pressure on the preset concentration compensation curve, the processor can calculate the concentration compensation value, which can increase the speed and efficiency of the battery cell detecting the gas inside the shell, and can also facilitate the detection of gas changes inside the battery cell shell.

[0043] In a third aspect, the present application provides a battery comprising the battery cell in the above embodiment.

[0044] In some embodiments, the battery includes a processor coupled to the air pressure module and the gas sensing module. The processor is configured to receive a gas concentration and air pressure, obtain a concentration compensation value that matches the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

[0045] By arranging a battery cell equipped with the gas sensor described in the above embodiment in the battery, the battery can more accurately detect the situation inside the battery, facilitate the comparison of the concentration of the preset gas, and promptly detect the changes in the gas inside the battery in the event of thermal runaway gas leakage, thereby improving the accuracy of other detection inside the battery.

[0046] In a fourth aspect, the present application provides a gas concentration detection method, which is applied to the battery cell or the battery in the above embodiment. The method comprises:

[0047] Get the air pressure detected by the air pressure module of the gas sensor.

[0048] Get the gas concentration detected by the gas sensing module of the gas sensor under air pressure.

[0049] Get the concentration compensation value that matches the atmospheric pressure.

[0050] The concentration compensation value is used to compensate the gas concentration to obtain the corrected gas concentration.

[0051] Through the above settings, the air pressure can be used to calculate the concentration compensation value that matches the air pressure, and then the concentration compensation value can be used to obtain the correct corrected gas concentration to solve the problem of the influence of air pressure changes on gas detection and improve the accuracy of gas detection.

[0052] In some embodiments, obtaining a concentration compensation value that matches the air pressure includes:

[0053] A concentration compensation value that matches the air pressure is determined on a preset concentration compensation curve. The preset concentration compensation curve is used to characterize the corresponding relationship between the air pressure and the concentration compensation value.

[0054] By calculating a concentration compensation value that matches the air pressure and using the concentration compensation value to compensate for the gas concentration to obtain a corrected gas concentration, the impact of air pressure changes on gas detection is resolved, the error in gas detection is reduced, and the speed and efficiency of battery cell detection of gas inside the shell can be increased.

[0055] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

Brief Description of the Drawings

[0056] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0057] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0058] FIG2 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0059] FIG3 is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0060] FIG4 is a schematic diagram of a circuit structure of a gas sensor according to some embodiments of the present application;

[0061] FIG5 is a schematic structural diagram of a gas sensor according to some embodiments of the present application;

[0062] FIG6 is a schematic structural diagram of a gas sensor according to some other embodiments of the present application;

[0063] FIG7 is a schematic diagram of a circuit structure of a circuit assembly according to some embodiments of the present application;

[0064] FIG8 is a schematic flow chart of the steps of a gas concentration detection method according to some embodiments of the present application.

[0065] The accompanying drawings in the specific implementation manner are as follows:

[0066] Vehicle 1000a;

[0067] Battery 100a, controller 200a, motor 300a;

[0068] Box 10a, first part 11a, second part 12a;

[0069] Battery cell 1, housing 100, electrode assembly 200, end cap 120, electrode terminal 121, tab 201;

[0070] Gas sensor 300, base 310, air pressure module 320, gas sensing module 330, first resistor 321, second resistor 322, third resistor 323, fourth resistor 324, first power supply terminal 325, second power supply terminal 326, first signal terminal 327, second signal terminal 328, first connecting terminal 301, second connecting terminal 302, gas sensing resistor 331, middle detection section 3311, two side detection sections 3312, first detection terminal 332, second detection terminal 333, first lining layer 303, second lining layer 304, electrode layer 305, sensitive layer 306, accommodation space 307, anti-corrosion film layer 308, adhesive layer 309;

[0071] Circuit component 2, processor 400. [Specific implementation method]

[0072] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0073] 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 only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0074] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0075] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0076] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0077] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0078] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do 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 embodiments of the present application.

[0079] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0080] Due to the significant advantages of gas sensors such as high precision, good selectivity, good stability, less environmental interference factors, and long life, gas sensors are widely used in coal mining, petroleum, chemical industry, medical treatment, transportation and other fields. In recent years, they have been widely used in the new energy battery industry.

[0081] However, the inventors have noted that existing gas sensors are easily affected by environmental factors (such as air pressure), resulting in inaccurate measurement results. For example, when battery cells trigger chain reactions due to various factors, carbon monoxide, hydrogen, and hydrogen sulfide leaks are very likely to occur. Therefore, battery cells are often equipped with gas sensors to detect conditions within the cells. However, when using a gas sensor to detect a preset gas concentration in a fixed space, if the concentration of other gases increases while the preset gas concentration remains unchanged, the preset gas test value will decrease, resulting in inaccurate measurements.

[0082] Based on the above considerations, the present application provides a gas sensor, a battery cell, a battery, and a gas concentration detection method. By providing an air pressure module and a gas sensitive module in the gas sensor, the gas sensor can simultaneously test the air pressure and the concentration of the corresponding gas in the measured space. When the concentration of other gases increases but the concentration of the measured gas remains unchanged, the actual gas concentration can be calculated based on the air pressure and the corresponding gas concentration at the air pressure. In this way, the air pressure can be included in the influence of the gas concentration measurement result, making it easier to modify the gas concentration, thereby improving the detection accuracy of the gas sensor and solving the problem of the influence of air pressure changes in the measured environment on gas detection.

[0083] The gas sensors disclosed in the embodiments of this application can be installed inside a battery cell or battery to test the internal gas conditions of the battery cell or battery. Furthermore, the battery cells disclosed in the embodiments of this 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.

[0084] Electrical devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, etc. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0085] For the convenience of description, the following embodiments are described by taking a vehicle 1000a as an example of an electrical device according to an embodiment of the present application.

[0086] Referring to Figure 1, vehicle 1000a can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery 100a is provided inside vehicle 1000a. Battery 100a can be provided at the bottom, head, or tail of vehicle 1000a. Battery 100a can be used to power vehicle 1000a. For example, battery 100a can serve as an operating power source for vehicle 1000a. Vehicle 1000a can also include a controller 200a and a motor 300a. Controller 200a is used to control battery 100a to power motor 300a, for example, to meet the power requirements for starting, navigating, and driving the vehicle 1000a.

[0087] In some embodiments of the present application, the battery 100a can serve not only as an operating power source for the vehicle 1000a, but also 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.

[0088] In some embodiments, the battery 100a may be an energy storage device, which may include an energy storage container, an energy storage cabinet, etc.

[0089] The battery 100 a mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells 1 to provide higher voltage and capacity.

[0090] In the embodiment of the present application, the battery cell 1 may be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after discharge and continue to be used. Each battery cell 1 may also be a primary battery.

[0091] 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.

[0092] In some embodiments, the battery 100 a 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.

[0093] In some embodiments, referring to FIG. 2 , the battery 100 a may be a battery pack, which includes a housing 10 a and battery cells 1 . The battery cells 1 or battery modules are housed in the housing 10 a .

[0094] In some embodiments, the box 10a can serve as part of the chassis structure of the vehicle 1000a. For example, a portion of the box 10a can become at least a portion of the floor of the vehicle 1000a, or a portion of the box 10a can become at least a portion of the cross member and longitudinal member of the vehicle 1000a.

[0095] Referring to Figure 2, the battery 100a includes a housing 10a and a battery cell 1, with the battery cell 1 being housed within the housing 10a. The housing 10a is used to provide a storage space for the battery cell 1, and the housing 10a can adopt a variety of structures. In some embodiments, the housing 10a can include a first portion 11a and a second portion 12a, with the first portion 11a and the second portion 12a overlapping each other, and the first portion 11a and the second portion 12a jointly defining a storage space for accommodating the battery cell 1. The second portion 12a can be a hollow structure with one end open, and the first portion 11a can be a plate-like structure, with the first portion 11a overlapping the open side of the second portion 12a, so that the first portion 11a and the second portion 12a jointly define a storage space; the first portion 11a and the second portion 12a can also be hollow structures with one end open, with the open side of the first portion 11a overlapping the open side of the second portion 12a. Of course, the box body 10a formed by the first part 11a and the second part 12a can be in various shapes, such as a cylinder, a cuboid, etc.

[0096] In battery 100a, there may be multiple battery cells 1, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the battery cells 1. Multiple battery cells 1 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire battery cell 1 may be housed within the housing 10a. Alternatively, battery 100a may comprise multiple battery cells 1 connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 10a. Battery 100a may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 1.

[0097] Referring to Figure 3 , a battery cell 1 is the smallest unit of a battery. In this embodiment, a cylindrical battery cell 1 is used as an example. As shown in Figure 3 , the battery cell 1 includes a housing 100 , an electrode assembly 200 , and other functional components.

[0098] In some embodiments, the housing 100 is used to encapsulate the electrode assembly 200 and the electrolyte and other components. The housing 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 an aluminum-plastic film.

[0099] The outer shell 100 may include an end cap 120 and a shell 110. The end cap 120 refers to a component that covers the opening of the shell 110 to isolate the internal environment of the battery cell 1 from the external environment. Without limitation, the shape of the end cap 120 can be adapted to the shape of the shell 110 to match the shell 110. Optionally, the end cap 120 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 120 is not easily deformed when squeezed or collided, so that the battery cell 1 can have a higher structural strength and improved safety performance. Functional components such as electrode terminals 121 can be provided on the end cap 120. The electrode terminal 121 can be used to electrically connect to the electrode assembly 200 for outputting or inputting electrical energy of the battery cell 1. In some embodiments, the end cap 120 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold. The end cap 120 may be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating component may be disposed inside the end cap 120 to isolate the electrical connection components within the housing 110 from the end cap 120 to reduce the risk of short circuits. Exemplary materials include plastic, rubber, and the like.

[0100] The housing 110 is a component that cooperates with the end cap 120 to form the internal environment of the battery cell 1. This internal environment can be used to accommodate the electrode assembly 200, electrolyte, and other components. The housing 110 and end cap 120 can be separate components. An opening 111 can be provided in the housing 110, and the end cap 120 is placed over the opening 111 to form the internal environment of the battery cell 1. Alternatively, the end cap 120 and housing 110 can be integrated. Specifically, the end cap 120 and housing 110 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 110 is to be enclosed, the end cap 120 is placed over the housing 110. The housing 110 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the housing 110 can be determined based on the specific shape and size of the electrode assembly 200. The housing 110 can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0101] The electrode assembly 200 is a component where electrochemical reactions occur in the battery cell 1. One or more electrode assemblies 200 may be contained in the housing 110.

[0102] 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, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator is positioned between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0103] In some embodiments, the positive electrode may be a positive electrode sheet, which 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.

[0104] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0105] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0106] As an example, the positive electrode 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 for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi1 / 3Co1 / 3Mn1 / 3O2 (also referred to as NCM333), LiNi0.5Co0.2Mn0.3O2 (also referred to as NCM523), LiNi0.5Co0.25Mn0.25O2 (also referred to as NCM211), LiNi0.6Co0.2Mn0.2O2 (also referred to as NCM622), LiNi0.8Co0.1Mn0.1O2 (also referred to as NCM811), lithium nickel cobalt aluminum oxide (such as LiNi0.85Co0.15Al0.05O2) and at least one of their modified compounds.

[0107] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0108] As an example, the negative electrode current collector can be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium can be used. The metal foam can be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0109] 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.

[0110] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is provided on either or both of the two facing surfaces of the negative electrode current collector.

[0111] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells that is well known in the art. As an example, the negative electrode 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, etc. 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 negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0112] 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.

[0113] In some embodiments, the electrode assembly 200 further includes a separator disposed between the positive electrode and the negative electrode.

[0114] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0115] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0116] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0117] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0118] The liquid electrolyte includes an electrolyte salt and a solvent.

[0119] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0120] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, ethyl methyl 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, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent can also be an ether solvent. Ether solvents can 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.

[0121] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0122] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0123] As an example, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, or the like.

[0124] As an example, the inorganic solid electrolyte can 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 phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0125] As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0126] In some embodiments, the electrode assembly 200 is a wound structure in which the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0127] In some embodiments, the electrode assembly 200 is provided with tabs 201 that conduct current from the electrode assembly 200. Tabs include positive and negative tabs. The positive and negative tabs can be located together at one end of the main body or separately at opposite ends of the main body. During the charge and discharge process of the battery 100a, the positive and negative active materials react with the electrolyte, and the tabs 201 connect to the electrode terminals 121 to form a current loop.

[0128] According to some embodiments of the present application, as shown in FIG4 , a gas sensor 300 may include a base 310, an air pressure module 320, and a gas sensing module 330. The air pressure module 320 is disposed on the base 310 and is configured to detect air pressure in the environment. The gas sensing module 330 is disposed on the base 310 and spaced apart from the air pressure module 320 and is configured to detect the gas concentration of a predetermined gas at a predetermined pressure in the environment.

[0129] The preset gas may include carbon monoxide, carbon dioxide, hydrogen, methane, etc. The preset gas may be set corresponding to the gas sensing module 330, and the preset gas may trigger the gas sensing module 330 to produce corresponding changes, so that when the detection environment contains the preset gas, the gas sensing module 330 can detect the preset gas and determine the gas concentration of the preset gas.

[0130] By setting an air pressure module 320 and a gas sensitive module 330 in the gas sensor 300, the gas sensor 300 can simultaneously test the air pressure, concentration and composition of the gas in the measured space. When the concentration of other gases increases but the concentration of the measured gas remains unchanged, the actual gas concentration can be calculated based on the air pressure and the corresponding gas concentration under the air pressure. In this way, the air pressure can be included in the influence of the measurement result of the gas concentration, which facilitates the modification of the gas concentration, thereby improving the detection accuracy of the gas sensor 300.

[0131] In some embodiments, as shown in FIG4 , the air pressure module 320 may include a first resistor 321, a second resistor 322, a third resistor 323, and a fourth resistor 324 disposed on the base 310. The first end of the first resistor 321 may be connected to the first end of the third resistor 323, the second end of the first resistor 321 may be connected to the first end of the second resistor 322, the second end of the third resistor 323 may be connected to the first end of the fourth resistor 324, and the second end of the second resistor 322 may be connected to the second end of the fourth resistor 324.

[0132] The air pressure module 320 may include a first power supply terminal 325, a second power supply terminal 326, a first signal terminal 327, and a second signal terminal 328 disposed on the base 310. The first power supply terminal 325 is electrically connected to the first end of the first resistor 321. The second power supply terminal 326 is electrically connected to the second end of the second resistor 322. The first signal terminal 327 is electrically connected to the second end of the first resistor 321, and the second signal terminal 328 is electrically connected to the second end of the third resistor 323. The first resistor 321, the second resistor 322, the third resistor 323, and the fourth resistor 324 have equal resistance values, and at least one of them is a piezoresistor.

[0133] Optionally, the first power supply terminal 325 and the second power supply terminal 326 can be connected to an external power source, and the first signal terminal 327 and the second signal terminal 328 can be connected to a detection electrical element, such as an ammeter. The first resistor element 321, the second resistor element 322, the third resistor element 323, and the fourth resistor element 324 can form a square, so that the air pressure module 320 forms a Wheatstone bridge circuit. Optionally, one of the first resistor element 321, the second resistor element 322, the third resistor element 323, and the fourth resistor element 324 is a varistor, and the other three are known resistors.

[0134] During normal operation of the air pressure module 320, when the detection element detects that no current is flowing through the bridge circuit, the bridge is in equilibrium. If the varistor senses changes in the air pressure in the detection environment and changes, the detection element can collect the voltage across the variable varistor and process it to calculate the corresponding air pressure change, thereby accurately detecting air pressure changes in the environment. Furthermore, the Wheatstone bridge circuit has the characteristics of high measurement accuracy and high sensitivity. Therefore, using a Wheatstone bridge circuit can improve the measurement accuracy and sensitivity of the air pressure module 320.

[0135] In some embodiments, as shown in FIG4 , the first power supply terminal 325, the second power supply terminal 326, the first signal terminal 327, and the second signal terminal 328 can be spaced apart and arranged on the same side of the base 310. This arrangement can facilitate the separation of the circuits associated with the air pressure module 320 from the circuits of other modules and also facilitate the wiring arrangement of the gas sensor 300.

[0136] In some embodiments, as shown in FIG4 , the air pressure module 320 may have a plurality of first connection terminals 301, and the air sensing module 330 may have a plurality of second connection terminals 302. The plurality of first connection terminals 301 may be spaced apart on one side of the base 310, and the plurality of second connection terminals 302 may be spaced apart on the other side of the base 310.

[0137] Optionally, the first power supply terminal 325, the second power supply terminal 326, the first signal terminal 327, and the second signal terminal 328 of the air pressure module 320 all serve as the first connection terminals 301 of the air pressure module 320, which can be connected to other module circuits to enable information transmission or power supply between the other modules. Similarly, the gas sensing module 330 can be connected to other module circuits via the plurality of second connection terminals 302 to enable information transmission or power supply between the other modules.

[0138] By respectively arranging the multiple first connection terminals 301 and the multiple second connection terminals 302 on both sides of the base 310, the multiple first connection terminals 301 and the multiple second connection terminals 302 are less likely to interfere with each other, making it easy to distinguish the multiple first connection terminals 301 and the multiple second connection terminals 302, and also facilitating the wiring arrangement of the gas sensor 300.

[0139] In some embodiments, one side of the base 310 can be disposed opposite another side of the base 310. Alternatively, one side of the base 310 can be connected to another side of the base 310 and disposed at an angle. By arranging the first connection terminal 301 and the second connection terminal 302 on different sides of the base 310, the wiring layout of the gas sensor 300 can be facilitated.

[0140] In some embodiments, as shown in FIG4 , the gas sensing module 330 may include a gas sensing resistor element 331. The gas sensing resistor element 331 may include a middle detection segment 3311 and two side detection segments 3312. The middle detection segment 3311 may be connected between the two side detection segments 3312. The two side detection segments 3312 are connected to the middle detection segment 3311 in a bent manner.

[0141] The gas-sensitive resistor element 331 can correspond to a preset gas. When the gas-sensitive resistor element 331 comes into contact with the preset gas, it can react with the preset gas, and its resistance value will also change accordingly, thereby converting the concentration of the preset gas into an electrical signal, so that the gas sensing module 330 can detect the concentration of the preset gas in the detection environment through the gas-sensitive resistor element 331.

[0142] Furthermore, by providing multiple detection sections, the detection area of ​​the gas sensing module 330 can be increased, thereby being able to detect the gas to be detected in a larger range, thereby improving the detection accuracy of the gas sensing module 330 .

[0143] In some embodiments, the two side detection sections 3312 may extend away from the air pressure module 320. This can reduce the impact of the air pressure module 320 on the side detection sections 3312, making it less likely for the air pressure module 320 to interfere with the detection of the gas sensor module 330, thereby improving the detection accuracy of the gas sensor module 330.

[0144] In some embodiments, the gas sensing module 330 may include two first detection terminals 332 disposed on the base 310 , and the two first detection terminals 332 are disposed at ends of the two side detection sections 3312 away from the middle detection section 3311 .

[0145] By setting two first detection terminals 332 on the two side detection segments 3312, the gas sensing module 330 can detect the resistance changes of the side detection segments 3312 and the middle detection segment 3311 through the two first detection terminals 332, thereby obtaining the concentration of the preset gas through the resistance changes of the side detection segments 3312 and the middle detection segment 3311, thereby improving the detection accuracy of the gas sensing module 330.

[0146] In some embodiments, the gas sensing module 330 may include two second detection terminals 333 disposed on the base 310. The two second detection terminals 333 are disposed at ends of the two side detection segments 3312 away from the middle detection segment 3311. At the same end of the gas sensor element, the first detection terminal 332 and the second detection terminal 333 are staggered.

[0147] By setting up two second detection terminals 333, the two first detection terminals 332 and the two second detection terminals 333 can form a four-wire method. Using the four-wire method to detect the gas-sensitive resistor element 331 can improve the detection accuracy, thereby improving the detection accuracy of the gas sensing module 330 and reducing measurement errors.

[0148] Optionally, the first detection terminal 332 and the second detection terminal 333 may both serve as the second connection terminal 302 of the gas sensing module 330 , and be disposed on a side of the base 310 different from the first connection terminal 301 .

[0149] In some embodiments, the end of each side detection segment 3312 may include two branch segments that are connected to each other and branched, and the first detection terminal 332 and the second detection terminal 333 are respectively provided in the two branch segments.

[0150] By arranging the first detection terminal 332 and the second detection terminal 333 in different branch sections, so that the two first detection terminals 332 and the two second detection terminals 333 are connected to different endpoints, the gas sensor element 331 can be measured more effectively and accurately.

[0151] In some embodiments, the preset gas may include hydrogen, and the material of the gas-sensitive resistor element 331 may include at least one of palladium, nickel, platinum, a palladium alloy, a nickel alloy, and a platinum alloy.

[0152] Among them, hydrogen can react with active materials such as palladium, nickel, platinum, palladium alloy, nickel alloy or platinum alloy. After absorbing hydrogen molecules, the physical parameters such as resistance and thermal conductivity of active materials such as palladium, nickel, platinum, palladium alloy, nickel alloy or platinum alloy will change. Then, the concentration of hydrogen can be detected by detecting the physical parameters such as resistance and thermal conductivity of the gas-sensitive resistor element 331.

[0153] Therefore, materials such as palladium, nickel, platinum, palladium alloy, nickel alloy and platinum alloy are used as the material of the gas sensitive resistor element 331, so that the gas sensor 300 can detect the presence of hydrogen more sensitively and detect the concentration of hydrogen more accurately, and can also increase the response speed of the gas sensor 300 and enable the gas sensitive resistor element 331 to work stably for a long time.

[0154] Of course, in other embodiments, the preset gas may include carbon dioxide, carbon monoxide and other gases, and the material of the gas-sensitive resistor element 331 may also be other materials corresponding to the preset gas, which will not be listed in detail one by one in this application.

[0155] In some other embodiments, as shown in Figure 5, the air pressure module 320 may include a first lining layer 303, a second lining layer 304, an electrode layer 305 and a sensitive layer 306. The first lining layer 303 is arranged on the base 310, the electrode layer 305 is arranged on the side of the first lining layer 303 away from the base 310, the second lining layer 304 is connected to the first lining layer 303 to enclose a receiving space 307 for accommodating the sensitive layer 306 and the base layer, and the sensitive layer 306 and the electrode layer 305 are arranged opposite to each other.

[0156] Among them, the first lining layer 303 and the second lining layer 304 can be polyimide films. Polyimide films have excellent heat resistance, chemical stability, moisture and heat resistance and insulation properties. Therefore, the second lining layer 304 and the first lining layer 303 are set to polyimide films and enclosed to form a accommodating space 307 for accommodating the sensitive layer 306 and the base layer, which can well protect the sensitive layer 306 and the electrode layer 305.

[0157] Optionally, the electrode layer 305 may be made of a conductive material such as copper or silver. The sensitive layer 306 may be made of a flexible metal sheet, a semiconductor material, or a ceramic material.

[0158] With the above arrangement, when air pressure acts on the second liner 304, thereby acting on the sensitive layer 306, and when the sensitive layer 306 deforms due to the pressure, the capacitance formed between the sensitive layer 306 and the electrode layer 305 changes. The measurement circuit can then output an electrical signal that is proportional to the air pressure, thereby measuring the change in gas pressure. This effectively improves the measurement accuracy of the gas sensor 300 and also enhances the stability and reliability of the air pressure sensor. Alternatively, when air pressure acts on the second liner 304, thereby acting on the sensitive layer 306, and the sensitive layer 306 deforms due to the pressure and comes into contact with the electrode layer 305, the electrode layer 305 can calculate the air pressure in the detection environment based on the contact area between the sensitive layer 306 and the electrode layer 305, and output a related electrical signal to determine the air pressure value in the detection environment.

[0159] Optionally, the electrode layer 305 can be a piezoresistor in the first resistance element 321, the second resistance element 322, the third resistance element 323 and the fourth resistance element 324 in the air pressure module 320. When the electrode layer 305 changes, the resistance change of the piezoresistor can be measured by the Wheatstone bridge composed of the first resistance element 321, the second resistance element 322, the third resistance element 323 and the fourth resistance element 324, thereby obtaining the air pressure value in the detection environment.

[0160] In other embodiments, as shown in Figure 6, the air pressure module 320 may include a first lining layer 303, a second lining layer 304 and an electrode layer 305, the first lining layer 303 is arranged on the base 310, the electrode layer 305 is arranged on the side of the first lining layer 303 away from the base 310, the second lining layer 304 is connected to the first lining layer 303 to enclose a receiving space 307 for accommodating the sensitive layer 306 and the base layer, and the sensitive layer 306 and the electrode layer 305 are arranged opposite to each other.

[0161] The electrode layer 305 may include a first resistor 321, a second resistor 322, a third resistor 323, and a fourth resistor 324. At least one of the four resistors 321, 322, 323, and 324 is a varistor. The specific configurations of the first resistor 321, 322, 323, and 324 are described above and are not further described in this embodiment.

[0162] In some embodiments, as shown in Figures 5 and 6, the air pressure module 320 may further include an anti-corrosion film layer 308, which is deposited by vapor deposition and coated on the outer surface of the first lining layer 303, and covers the joint between the first lining layer 303 and the second lining layer 304.

[0163] Among them, the anti-corrosion film layer 308 may include but is not limited to corrosion-resistant components such as polyparaxylene, polyethylene, propylene, polyacrylate, PET, TPU, silicone, and silicone, so that the anti-corrosion film layer 308 can protect the air pressure module 320 from being corroded by other external substances, and can also form a secondary double protection on the outer surface of the first lining layer 303 and the second lining layer 304 to protect the sensitive layer 306 and the electrode layer 305.

[0164] In addition, an anti-corrosion film layer 308 is provided on the outer surface of the first lining layer 303 and in the joint between the first lining layer 303 and the second lining layer 304, which can improve the corrosion resistance of the air pressure module 320 and prevent other substances such as electrolyte from entering the accommodating space 307 to affect the capacitance formed between the sensitive layer 306 and the electrode layer 305 or even damage the air pressure module 320, thereby improving the reliability and stability of the air pressure module 320.

[0165] Furthermore, the anti-corrosion film layer 308 is provided by deposition, which can facilitate adjustment of the thickness of the anti-corrosion film layer 308 and simplify the manufacturing process of the gas sensor 300 .

[0166] In some embodiments, the air pressure module 320 may further include an adhesive layer 309 bonded between the first lining layer 303 and the second lining layer 304 , and the anti-corrosion film layer 308 covers the adhesive layer 309 and the bonding gap between the adhesive layer 309 and the first lining layer 303 and the second lining layer 304 .

[0167] The adhesive layer 309 may be made of a material with excellent corrosion resistance, such as epoxy resin adhesive.

[0168] By setting the adhesive layer 309 and bonding it between the first lining layer 303 and the second lining layer 304, other substances such as electrolyte are prevented from entering the accommodating space 307 to affect or corrode the sensitive layer 306 and the electrode layer 305, thereby protecting the sensitive layer 306 and the electrode layer 305, thereby improving the reliability of the air pressure module 320.

[0169] In some embodiments, a side of the electrode layer 305 facing the sensitive layer 306 may be higher than a side of the glue layer 309 facing the second liner 304 .

[0170] Through the above configuration, the sensitive layer 306 can be more easily moved closer to or adhered to the electrode layer 305 under the action of air pressure, so that the electrode layer 305 can more easily detect changes in capacitance, thereby making the detection of the air pressure module 320 more sensitive and the detection results more accurate.

[0171] In some embodiments of the present application, as shown in FIG7 , the present application provides a circuit assembly 2 comprising the gas sensor 300 and a processor 400 of the aforementioned embodiment. The processor 400 may be coupled to the air pressure module 320 and the gas sensing module 330. The processor 400 is configured to receive a gas concentration and air pressure, obtain a concentration compensation value that matches the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

[0172] The processor 400 may be an integrated circuit chip with signal processing capabilities. The processor 400 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. The general-purpose processor may be a microprocessor, or the processor 400 may be any conventional processor 400.

[0173] The concentration compensation value can be the difference in concentration of the same preset gas at different pressures. When using gas sensor 300 to detect the gas concentration in a fixed space, if the concentration of other gases increases while the concentration of the measured gas remains unchanged, the gas concentration value will decrease, resulting in inaccurate measurements. Therefore, the concentration compensation value is used to compensate for the gas concentration to obtain a corrected gas concentration, which can be used to determine the actual gas concentration under the corresponding pressure standard.

[0174] Optionally, multiple first connection terminals 301 of the air pressure module 320 and multiple second connection terminals 302 of the gas sensitive module 330 can be connected to the processor 400, so that the processor 400 can receive the electrical signal related to the air pressure output from the air pressure module 320 and the electrical signal related to the preset gas concentration output from the gas sensitive module 330, and the processor 400 can process the relevant electrical signals to obtain the air pressure in the detection environment and the concentration of the preset gas.

[0175] By coupling the processor 400 to the air pressure module 320 and the gas sensing module 330, the processor 400 can process and obtain the preset gas concentration and air pressure values, and use the concentration compensation value to compensate the preset gas concentration to obtain the corrected gas concentration, thereby solving the impact of air pressure changes on gas concentration detection, reducing gas detection errors, and improving detection accuracy.

[0176] In some embodiments, the processor 400 is configured to determine a concentration compensation value that matches the air pressure on a preset concentration compensation curve. The preset concentration compensation curve is configured to represent a correspondence between the air pressure and the concentration compensation value.

[0177] Among them, the processor 400 can obtain a preset concentration compensation curve in advance. The preset concentration compensation curve corresponds to the detection environment, and the preset concentration compensation curve can reflect the correspondence between the air pressure and the concentration compensation value in the detection environment. Optionally, the preset concentration compensation curve can be characterized as a pressure change curve of the detection environment under the same closed detection environment when the concentration of the preset gas remains unchanged. Therefore, the change value of the concentration of the preset gas under different air pressures can be obtained from the preset concentration compensation curve, so that the air pressure and concentration detected by the air pressure module 320 and the gas sensitive module 330 are substituted into the preset concentration compensation curve to obtain the concentration compensation value, so that the concentration of the preset gas under the required air pressure standard can be obtained.

[0178] Through the above settings, the processor 400 can directly identify the concentration compensation value that matches the gas pressure, and can quickly use the concentration compensation value to compensate the gas concentration to obtain the corrected gas concentration. Therefore, using the preset concentration compensation curve to calculate the corrected gas concentration can increase the speed and efficiency of detection.

[0179] In some embodiments of the present application, as shown in FIG3 , the battery cell 1 further includes a housing 110, an electrode assembly 200, and the gas sensor 300 described in the above embodiment. The electrode assembly 200 is disposed within the housing 110. The gas sensor 300 is disposed within the housing 110 to detect gas and / or gas pressure within the housing 110.

[0180] Because the battery cell 1's housing 110 also contains an electrolyte, the positive and negative electrodes in the electrode assembly 200 can react with the electrolyte to transfer ions and isolate the positive and negative electrodes, thereby enabling the discharge or charge process within the battery cell 1. However, during this process, if the internal temperature of the battery is too high or there is too much water in the electrolyte, gases such as hydrogen will be generated within the battery cell 1. This process can cause the internal pressure of the battery cell 1 to increase, and may even cause the battery to explode.

[0181] Therefore, by setting the gas sensor 300 in the above embodiment inside the shell 110 of the battery cell 1, the gas pressure and concentration of the preset gas inside the shell 110 of the battery cell 1 can be detected, and the situation inside the shell 110 of the battery cell 1 can be grasped in real time, so as to facilitate subsequent corresponding protective measures for the battery cell 1.

[0182] In some embodiments, the battery cell 1 may include a processor 400 coupled to the air pressure module 320 and the gas sensing module 330. The processor 400 is configured to receive the gas concentration and the air pressure, obtain a concentration compensation value that matches the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

[0183] The processor 400 calculates a concentration compensation value that matches the air pressure and uses the concentration compensation value to compensate for the gas concentration to obtain a corrected gas concentration. When the concentration of the preset gas inside the shell 110 of the battery cell 1 remains unchanged and the concentration of other gases increases, the exact content of the preset gas inside the shell 110 of the battery cell 1 can also be accurately obtained, which can solve the impact of air pressure changes on gas detection and reduce gas detection errors. It can solve the problem of the impact of air pressure changes inside the shell 110 on gas detection and improve the accuracy of gas detection inside the shell 110 of the battery cell 1.

[0184] Optionally, the battery cell 1 may further include the circuit assembly 2 described in the above embodiment, which may include a gas sensor 300 and a processor 400. The circuit assembly 2 may be disposed on the end cap 120, and the gas sensor 300 may detect the gas conditions within the housing 110 of the battery cell 1. The processor 400 is disposed on the side of the end cap 120 facing away from the electrode assembly 200, so that the processor 400 is less susceptible to corrosion from the electrolyte within the housing 110 of the battery cell 1.

[0185] In some embodiments, the processor 400 is configured to determine a concentration compensation value that matches the air pressure on a preset concentration compensation curve. The preset concentration compensation curve is configured to represent a correspondence between the air pressure and the concentration compensation value.

[0186] The preset concentration compensation curve can be specifically characterized as a pressure change curve within the housing 110 of the battery cell 1, while maintaining the concentration of the preset gas when testing the interior of the housing 110 of the battery cell 1. The preset concentration compensation curve can be obtained by the processor 400 through pre-testing. In subsequent testing, the obtained pressure within the housing 110 of the battery cell 1 and the concentration of the preset gas can be substituted into the preset concentration compensation curve to obtain a concentration compensation value, thereby determining the concentration of the preset gas under the desired pressure standard.

[0187] For example, if the air pressure inside the shell 110 of the battery cell 1 is 100 kPa, the concentration of the preset gas is 60 mg / m3. When the preset gas does not increase even when other gases increase, the air pressure inside the shell 110 of the battery cell 1 rises to 150 kPa. The concentration of the preset gas is 80 mg / m3. It can be concluded that the concentration compensation value at the air pressure of 150 kPa is 20 mg / m3 relative to the air pressure of 100 kPa.

[0188] By determining a concentration compensation value that matches the air pressure on a preset concentration compensation curve, the processor 400 can calculate the concentration compensation value, thereby increasing the speed and efficiency of the battery cell 1 detecting the gas inside the housing 110 .

[0189] In some embodiments of the present application, as shown in FIG2 , the present application provides a battery 100 a , which includes the battery cell 1 in the above embodiment.

[0190] In some embodiments, the battery 100a may include a processor 400 coupled to the air pressure module 320 and the gas sensing module 330. The processor 400 is configured to receive a gas concentration and air pressure, obtain a concentration compensation value that matches the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

[0191] By arranging a battery cell 1 equipped with the gas sensor 300 described in the above embodiment within the battery 100a, the battery 100a can more accurately detect the situation inside the battery 100a. In the event of thermal runaway, gas leakage, etc. in the battery 100a, changes in the gas inside the battery 100a can be detected in a timely manner, thereby improving the accuracy of other detection inside the battery 100a.

[0192] In some embodiments of the present application, the present application provides a gas concentration detection method, which is applied to the battery cell 1 or the battery 100a in the above embodiment. As shown in FIG8 , the gas concentration detection method includes the following steps S100-S400:

[0193] S100: Acquire the air pressure detected by the air pressure module of the gas sensor.

[0194] The processor 400 continuously uses the air pressure module 320 of the gas sensor 300 to continuously test the air pressure inside the housing 110 of the battery cell 1 or inside the battery 100 a and obtains the air pressure value.

[0195] S200: Acquire the gas concentration detected by the gas sensing module of the gas sensor under the air pressure.

[0196] While detecting the air pressure inside the shell 110 of the battery cell 1 or inside the battery 100a, the processor 400 continuously uses the gas sensitive module 330 of the gas sensor 300 to continuously test the gas inside the shell 110 of the battery cell 1 or inside the battery 100a, determines whether the gas inside the shell 110 of the battery cell 1 or inside the battery 100a contains a preset gas, and detects the gas concentration of the preset gas.

[0197] S300: Acquire a concentration compensation value that matches the air pressure.

[0198] In some embodiments, obtaining the concentration compensation value that matches the air pressure includes determining the concentration compensation value that matches the air pressure on a preset concentration compensation curve. The preset concentration compensation curve is used to represent the correspondence between the air pressure and the concentration compensation value.

[0199] The preset concentration compensation curve can be obtained by testing in advance. Specifically, the air pressure and preset gas concentration inside the housing 110 of the battery cell 1 or the battery 100a can be tested in advance. While ensuring that the content of the preset gas remains unchanged, other gases are injected into the housing 110 of the battery cell 1 or the battery 100a, and the air pressure and preset gas concentration inside the housing 110 of the battery cell 1 or the battery 100a are continuously tested to obtain a concentration compensation value, and further obtain a preset concentration compensation curve that represents the corresponding relationship between the air pressure and the concentration compensation value.

[0200] Specifically, in the subsequent detection process of the battery cell 1, the actual air pressure value inside the shell 110 of the battery cell 1 or inside the battery 100a, and the gas concentration of the preset gas at this air pressure are correspondingly substituted into the preset concentration compensation curve to obtain a concentration compensation value matching the air pressure.

[0201] S400: Compensating the gas concentration using the concentration compensation value to obtain a corrected gas concentration.

[0202] After the concentration compensation value is determined, the concentration of the preset gas can be compensated by applying the concentration compensation value to the gas concentration, obtaining the corrected gas concentration at the required pressure standard. This facilitates comparison with the concentration of the preset gas. This mitigates the impact of pressure changes on gas detection, reduces gas detection errors, increases the speed and efficiency of the battery cell 1 detecting gas within the housing 110, and improves gas detection accuracy.

[0203] According to some embodiments of the present application, optionally, as shown in FIG4 , the gas sensor 300 includes a base 310, an air pressure module 320, and a gas sensing module 330. The air pressure module 320 is disposed on the base 310 for detecting the air pressure in the environment. The gas sensing module 330 is disposed on the base 310 and is spaced apart from the air pressure module 320 for detecting the gas concentration of a preset gas under air pressure in the environment. The air pressure module 320 includes a first resistor element 321, a second resistor element 322, a third resistor element 323, and a fourth resistor element 324 disposed on the base 310; the first end of the first resistor element 321 is connected to the first end of the third resistor element 323, the second end of the first resistor element 321 is connected to the first end of the second resistor element 322, the second end of the third resistor element 323 is connected to the first end of the fourth resistor element 324, and the second end of the second resistor element 322 is connected to the second end of the fourth resistor element 324. The air pressure module 320 includes a first power supply terminal 325, a second power supply terminal 326, a first signal terminal 327, and a second signal terminal 328, which are disposed on the base 310. The first power supply terminal 325 is electrically connected to the first end of the first resistor 321; the second power supply terminal 326 is electrically connected to the second end of the second resistor 322. The first signal terminal 327 is electrically connected to the second end of the first resistor 321, and the second signal output terminal is electrically connected to the second end of the third resistor 323. The first resistor 321, the second resistor 322, the third resistor 323, and the fourth resistor 324 have equal resistance values, and at least one of them is a piezoresistor. The first power supply terminal 325, the second power supply terminal 326, the first signal terminal 327, and the second signal terminal 328 are spaced apart and disposed on the same side of the base 310. The air pressure module 320 has a plurality of first connection terminals 301, and the air sensing module 330 has a plurality of second connection terminals 302. A plurality of first connection terminals 301 are spaced apart on one side of the base 310, and a plurality of second connection terminals 302 are spaced apart on the other side of the base 310. One side of the base 310 and the other side of the base 310 are disposed opposite to each other. Alternatively, one side of the base 310 and the other side of the base 310 are connected to each other and are disposed at an angle. The gas sensing module 330 includes a gas sensing resistor element 331, and the gas sensing resistor element 331 includes a middle detection section 3311 and two side detection sections 3312. The middle detection section 3311 is connected between the two side detection sections 3312; the two side detection sections 3312 are bent and connected to the middle detection section 3311. The two side detection sections 3312 extend in a direction away from the air pressure module 320. The gas sensing module 330 includes two first detection terminals 332 disposed on the base 310 . The two first detection terminals 332 are disposed at ends of two side detection sections 3312 away from the middle detection section 3311 .The gas sensing module 330 includes two second detection terminals 333 disposed on the base 310. The two second detection terminals 333 are disposed at the ends of the two side detection segments 3312 away from the middle detection segment 3311. At the same end of the gas sensor element, the first detection terminal 332 and the second detection terminal 333 are staggered. The end of each side detection segment 3312 includes two connected and bifurcated branches, with the first detection terminal 332 and the second detection terminal 333 respectively disposed on the two branches. The preset gas includes hydrogen, and the material of the gas sensor element 331 includes at least one of palladium, nickel, platinum, a palladium alloy, a nickel alloy, and a platinum alloy. The air pressure module 320 includes a first lining layer 303, a second lining layer 304, an electrode layer 305, and a sensitive layer 306. The first lining layer 303 is disposed on a base 310, and the electrode layer 305 is disposed on a side of the first lining layer 303 facing away from the base 310. The second lining layer 304 is connected to the first lining layer 303 to enclose a space 307 for accommodating the sensitive layer 306 and the base layer. The sensitive layer 306 is disposed opposite the electrode layer 305. The air pressure module 320 includes an anti-corrosion film 308, which is deposited by vapor deposition and covers the outer surface of the first lining layer 303 and the joint between the first lining layer 303 and the second lining layer 304. The air pressure module 320 includes an adhesive layer 309 bonded between the first lining layer 303 and the second lining layer 304. The anti-corrosion layer covers the adhesive layer 309 and the joint between the adhesive layer 309 and the first lining layer 303 and the second lining layer 304. A side of the electrode layer 305 facing the sensitive layer 306 is higher than a side of the adhesive layer 309 facing the second liner 304 .

[0204] According to some embodiments of the present application, as shown in FIG7 , the circuit assembly 2 includes the aforementioned gas sensor 300 and a processor 400. The processor 400 is coupled to the air pressure module 320 and the gas sensing module 330. The processor 400 is configured to receive the gas concentration and air pressure, obtain a concentration compensation value that matches the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration. The processor 400 is configured to determine a concentration compensation value that matches the air pressure on a preset concentration compensation curve. The preset concentration compensation curve is configured to characterize the correspondence between air pressure and concentration compensation value.

[0205] According to some embodiments of the present application, as shown in FIG3 , the battery cell 1 includes a shell 110, an electrode assembly 200 and the above-mentioned gas sensor 300. The electrode assembly 200 is arranged inside the shell 110. The gas sensor 300 as described in the above embodiment is arranged inside the shell 110 and is used to detect the gas and / or air pressure inside the shell 110. The battery cell 1 includes a processor 400, and the processor 400 is coupled to the air pressure module 320 and the gas sensitive module 330. The processor 400 is used to receive the gas concentration and air pressure, obtain a concentration compensation value matching the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration. The processor 400 is used to determine a concentration compensation value matching the air pressure on a preset concentration compensation curve. The preset concentration compensation curve is used to characterize the correspondence between the air pressure and the concentration compensation value.

[0206] According to some embodiments of the present application, as shown in FIG2 , battery 100a includes the aforementioned battery cell 1. Battery 100a includes a processor 400, which is coupled to a gas pressure module 320 and a gas sensing module 330. Processor 400 is configured to receive gas concentration and gas pressure, obtain a concentration compensation value that matches the gas pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

[0207] According to some embodiments of the present application, as shown in Figure 8, the gas concentration detection method includes: obtaining the air pressure detected by the air pressure module 320 of the gas sensor 300; obtaining the gas concentration detected by the gas sensitive module 330 of the gas sensor 300 under the air pressure; obtaining a concentration compensation value matching the air pressure; and using the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

[0208] Wherein, obtaining the concentration compensation value matching the air pressure further includes: determining the concentration compensation value matching the air pressure on a preset concentration compensation curve; the preset concentration compensation curve is used to characterize the corresponding relationship between the air pressure and the concentration compensation value.

[0209] In summary, the gas sensor 300 is provided with an air pressure module 320 and a gas sensing module 330. This design enables the gas sensor 300 to simultaneously measure the air pressure, concentration, and composition of the gas in the measured space, and to calculate the actual gas concentration based on the air pressure and the corresponding gas concentration at that pressure. This allows the air pressure to be factored into the gas concentration measurement results, facilitating modification of the gas concentration, thereby improving the detection accuracy of the gas sensor 300.

[0210] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A gas sensor, characterized in that: include: Pedestal; An air pressure module, disposed on the base, for detecting air pressure in the environment; The gas sensing module is arranged on the base and spaced apart from the air pressure module, and is used to detect the gas concentration of a preset gas in the environment under the air pressure.

2. The gas sensor according to claim 1, characterized in that The air pressure module includes a first resistor element, a second resistor element, a third resistor element and a fourth resistor element arranged on the base; the first end of the first resistor element is connected to the first end of the third resistor element, the second end of the first resistor element is connected to the first end of the second resistor element, the second end of the third resistor element is connected to the first end of the fourth resistor element, and the second end of the second resistor element is connected to the second end of the fourth resistor element; the air pressure module includes a first power supply terminal, a second power supply terminal, a first signal terminal and a second signal terminal arranged on the base, the first power supply terminal is electrically connected to the first end of the first resistor element; the second power supply terminal is electrically connected to the second end of the second resistor element; the first signal terminal is electrically connected to the second end of the first resistor element, and the second signal terminal is electrically connected to the second end of the third resistor element; wherein the resistance values ​​of the first resistor element, the second resistor element, the third resistor element and the fourth resistor element are equal, and at least one of them is a varistor.

3. The gas sensor according to claim 2, characterized in that: The first power supply terminal, the second power supply terminal, the first signal terminal and the second signal terminal are arranged at intervals on the same side of the base.

4. The gas sensor according to claim 1, characterized in that: The air pressure module has a plurality of first connection terminals, and the air sensing module has a plurality of second connection terminals; the plurality of first connection terminals are arranged at intervals on one side of the base, and the plurality of second connection terminals are arranged at intervals on the other side of the base.

5. The gas sensor according to claim 4, characterized in that: One side of the base and the other side of the base are arranged opposite to each other; or, one side of the base and the other side of the base are connected to each other and arranged at an angle.

6. The gas sensor according to claim 1, characterized in that The gas sensing module comprises a gas sensing resistor element, which comprises a middle detection section and two side detection sections, wherein the middle detection section is connected between the two side detection sections; and the two side detection sections are bent and connected to the middle detection section.

7. The gas sensor according to claim 6, characterized in that: The two side detection sections extend in a direction away from the air pressure module.

8. The gas sensor according to claim 6, characterized in that: The gas sensing module includes two first detection terminals arranged on the base, and the two first detection terminals are arranged on The two side detection sections are away from ends of the middle detection section.

9. The gas sensor according to claim 8, characterized in that: The gas sensing module includes two second detection terminals arranged on the base, and the two second detection terminals are arranged at the ends of the two side detection sections away from the middle detection section; at the same end of the gas sensitive resistor element, the positions of the first detection terminal and the second detection terminal are staggered with each other.

10. The gas sensor according to claim 9, characterized in that The end of each of the side detection segments includes two branch segments that are connected to each other and branched, and the first detection terminal and the second detection terminal are respectively arranged on the two branch segments.

11. The gas sensor according to claim 6, characterized in that: The preset gas includes hydrogen, and the material of the gas-sensitive resistor element includes at least one of palladium, nickel, platinum, palladium alloy, nickel alloy and platinum alloy.

12. The gas sensor according to claim 1, characterized in that: The air pressure module includes a first lining layer, a second lining layer, an electrode layer and a sensitive layer. The first lining layer is arranged on the base, the electrode layer is arranged on the side of the first lining layer away from the base, the second lining layer is connected to the first lining layer to enclose a storage space for accommodating the sensitive layer and the electrode layer, and the sensitive layer is arranged opposite to the electrode layer.

13. The gas sensor according to claim 12, characterized in that: The air pressure module comprises an anti-corrosion film layer, which is deposited by vapor deposition and coated on the outer surface of the first lining layer, and also covers the joint between the first lining layer and the second lining layer.

14. The gas sensor according to claim 13, characterized in that: The air pressure module includes an adhesive layer bonded between the first lining layer and the second lining layer, and the anti-corrosion film layer covers the adhesive layer and a bonding gap between the adhesive layer and the first lining layer and the second lining layer.

15. The gas sensor according to claim 14, characterized in that: A side surface of the electrode layer facing the sensitive layer is higher than a side surface of the adhesive layer facing the second lining layer.

16. A battery cell, characterized in that: include: case; An electrode assembly, disposed inside the shell; The gas sensor according to any one of claims 1 to 15 is arranged inside the shell and is used to detect the gas and / or air pressure inside the shell.

17. The battery cell according to claim 16, characterized in that: The battery cell includes a processor, which is coupled to the air pressure module and the gas sensing module; the processor is used to receive the gas concentration and the air pressure, obtain a concentration compensation value matching the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

18. The battery cell according to claim 17, characterized in that: The processor is used to determine a concentration compensation value that matches the air pressure on a preset concentration compensation curve; the preset concentration compensation curve is used to characterize the corresponding relationship between the air pressure and the concentration compensation value.

19. A battery, characterized in that: Comprising the battery cell as claimed in claim 16.

20. The battery according to claim 19, characterized in that The battery includes a processor, which is coupled to the air pressure module and the gas sensing module; the processor is used to receive the gas concentration and the air pressure, obtain a concentration compensation value matching the air pressure, and use the concentration compensation value to compensate the gas concentration to obtain a corrected gas concentration.

21. A gas concentration detection method, characterized in that: Applied to the battery cell according to claim 16 or the battery according to claim 19, the method comprises: Acquiring the air pressure detected by the air pressure module of the gas sensor; Acquiring the gas concentration detected by the gas sensing module of the gas sensor under the gas pressure; Obtaining a concentration compensation value matching the air pressure; The concentration of the gas is compensated by using the concentration compensation value to obtain a corrected gas concentration.

22. The method according to claim 21, characterized in that The obtaining of a concentration compensation value matching the air pressure comprises: A concentration compensation value matching the air pressure is determined on a preset concentration compensation curve; the preset concentration compensation curve is used to characterize the corresponding relationship between the air pressure and the concentration compensation value.

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