CN116338499A

CN116338499A - Method, apparatus and computer storage medium for detecting battery

Info

Publication number: CN116338499A
Application number: CN202310604200.7A
Authority: CN
Inventors: 吴凯; 林锶; 任少滕; 郑宏宇; 张文宇
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-06-27

Abstract

The embodiment of the application discloses a method, a device and a computer storage medium for detecting a battery, wherein the method comprises the following steps: acquiring the internal gas of the battery; detecting the battery according to the concentration of at least one gas in the internal gas; an internal gas is supplied to the inside of the battery. The method, the device and the computer storage medium for detecting the battery can detect the condition of the battery and simultaneously reduce the influence on the initial state of the box body of the battery.

Description

Method, apparatus and computer storage medium for detecting battery

Technical Field

The present application relates to the field of battery detection, and more particularly, to a method, apparatus, and computer storage medium for detecting a battery.

Background

With the development of battery technology, more and more batteries are applied to people's life. In order to detect whether the produced battery meets the standards, various tests are generally required to be performed on the battery before the battery leaves the factory, for example, to detect whether the battery cells in the battery are damaged.

However, in the related art, it is generally necessary to open the assembled battery and provide a related sensor inside the battery to detect whether the battery cell is damaged. In this way, the initial state of the battery will be affected, thereby affecting the subsequent testing of the battery.

Disclosure of Invention

The embodiment of the application provides a method, a device and a computer storage medium for detecting a battery, which can detect the condition of the battery and simultaneously reduce the influence on the initial state of a box body of the battery.

In a first aspect, there is provided a method of detecting a battery, the method comprising: acquiring the internal gas of the battery; detecting the battery according to the concentration of at least one gas in the internal gas; an internal gas is supplied to the inside of the battery.

In the embodiment of the application, the battery is detected according to the acquired gas in the battery, and the gas is conveyed into the battery, so that the condition of the battery can be determined, the influence on the initial state of the box body of the battery can be reduced, and the subsequent test of the battery is facilitated.

Optionally, in some embodiments of the present application, the internal gas includes a first gas and a second gas, where the first gas is a gas generated by an internal chemical reaction of the battery cell, and the second gas is a gas generated by volatilization of the electrolyte; detecting the battery based on the concentration of at least one gas in the internal gas, comprising: the cell is detected based on the concentration of the first gas and/or the concentration of the second gas.

In the embodiment of the application, because the gas concentration of the gas generated by self-discharge of the battery monomer and the gas concentration of the gas generated by volatilization of the electrolyte in the box body of the battery are related to the damage degree of the battery monomer, the damage condition of the battery can be more accurately determined by detecting the concentration of at least one type of gas in the two types of gases in the box body, the leakage of the electrolyte can be timely found, the probability of thermal runaway of the battery is reduced, and therefore, property loss and personal safety hidden danger are reduced.

Optionally, in some embodiments of the present application, detecting the battery according to the concentration of the first gas and/or the concentration of the second gas includes: detecting the concentration of the first gas and/or the concentration of the second gas; and outputting detection information according to the relation between the concentration of the first gas and the first reference concentration and/or the relation between the concentration of the second gas and the second reference concentration.

In this embodiment of the present application, due to the influence of mechanical errors and artifacts, under normal conditions, a portion of the first gas and the second gas still exist in the battery, and the detection information is output through the relationship between the concentration of the first gas and the first reference concentration and/or the relationship between the concentration of the second gas and the second reference concentration, so that the influence of mechanical errors and artifacts can be reduced, and the detection accuracy is improved.

Optionally, in some embodiments of the present application, the first gas includes a gas other than oxygen and nitrogen among gases generated by chemical reactions inside the battery cell; the second gas includes a gas common to the gases in which the electrolyte is volatilized in the battery cells of the plurality of chemical systems.

In the embodiment of the application, under the condition that the battery monomer is not damaged, a large amount of oxygen and nitrogen exist in the battery, so that the battery is detected according to the gas concentration of the gas except the oxygen and the nitrogen in the battery, and the detection sensitivity can be improved; and the method for detecting the battery improves the adaptability of the battery to battery monomers of different chemical systems according to the gas common in the gases volatilized by the electrolyte in the battery monomers of various chemical systems.

Alternatively, in some embodiments of the present application, the first gas is a gas common to gases generated by internal chemical reactions of the battery cells of the multiple chemical systems. Thus, the adaptability of the method for detecting the battery to different chemical system batteries can be further improved.

Optionally, in some embodiments of the present application, the method for detecting a battery is applied to vibration testing of the battery, where obtaining internal gas of the battery includes: in the case where the battery is in a vibration test state, the internal gas of the battery is extracted.

In the embodiment of the application, the method for detecting the battery is applied to the vibration test of the battery, and the internal gas of the battery is extracted under the condition that the battery is in the vibration test state, so that the influence on the initial state of the battery can be reduced, and meanwhile, the influence on the battery by vibration is determined.

Optionally, in some embodiments of the present application, the detection information includes a prompt signal, and outputting the detection information according to a relationship between the concentration of the first gas and the first reference concentration, and/or a relationship between the concentration of the second gas and the second reference concentration, including: and outputting a prompt signal when the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value and/or the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value. Therefore, the influence of the mechanical error of the detection component on the test result can be reduced, and the detection accuracy is improved.

Optionally, in some embodiments of the present application, the method for detecting a battery further includes: the prompting signal comprises a first early warning signal and/or a second early warning signal, and when the difference value between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value, and/or the difference value between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value, the prompting signal is output, which comprises: outputting a first early warning signal under the condition that the difference value between the concentration of the first gas and the first reference concentration is larger than or equal to a first preset threshold value; or outputting a second early warning signal when the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

In the embodiment of the application, the detection result is conveniently determined by the detection personnel through the first early warning signal and/or the second early warning signal, so that the abnormal condition of the battery is determined. And corresponding measures can be taken according to the abnormal condition of the battery, so that the failure probability of the battery is reduced.

Optionally, in some embodiments of the present application, the method for detecting a battery further includes: recording the output time of the first early warning signal and the concentration of the first gas; or, recording the output time of the second early warning signal and the concentration of the second gas.

In the embodiment of the application, the concentration of the gas and the output time of the early warning signal are recorded, so that the detection personnel can analyze according to the recorded information, the problem in the production process of the battery monomer is determined, and the production process of the battery monomer is improved.

Optionally, in some embodiments of the present application, the prompting signal includes an alarm signal, and outputting the prompting signal when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value, and/or a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value, where the outputting includes: and outputting an alarm signal when the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value and the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

In the embodiment of the application, through the alarm signal, the vibration test can be stopped in time, the probability of thermal runaway of the battery is reduced, and therefore the probability of failure of the battery is reduced.

Optionally, in some embodiments of the present application, the method for detecting a battery further includes: determining a concentration of a first gas in the battery as a first reference concentration prior to performing a vibration test on the battery; and/or determining the concentration of the second gas in the battery as the second reference concentration prior to performing the vibration test on the battery.

In the embodiment of the application, since the first gas and the second gas are also present in the battery when the battery cell is not damaged, the gas amounts of the first gas and the second gas in different batteries are also different. In this way, by taking the concentration of the first gas in the battery cell as the first reference concentration and/or the concentration of the second gas as the second reference concentration before the vibration test is performed on the battery, the damage condition of the battery cell can be more accurately determined according to the condition of the battery cell itself.

Optionally, in some embodiments of the present application, obtaining the internal gas of the battery includes: extracting internal gas of the battery through a first interface of the battery; delivering the internal gas to the interior of the cell includes: and delivering an internal gas to the interior of the battery through the second port of the battery. Therefore, the internal gas of the battery can be obtained without adding a new design on the battery, so that the condition of the battery can be conveniently detected, and the cost for detecting the battery is reduced.

Optionally, in some embodiments of the present application, the first interface is a pressure relief mechanism on a casing of the battery, and the second interface is a high-low pressure interface on the casing of the battery. Therefore, the internal gas is respectively extracted and conveyed through different interfaces on the battery box body, and the detection efficiency can be improved.

Optionally, in some embodiments of the present application, the time to deliver the internal gas to the interior of the cell is equal to the time to extract the internal gas of the cell. Therefore, the balance of the pressure in the box body of the battery can be conveniently maintained, and the damage to the battery is reduced.

In a second aspect, there is provided an apparatus for detecting a battery, the apparatus comprising: a gas transmission member for acquiring an internal gas of the battery; a detection means for detecting the battery based on the concentration of at least one gas in the internal gas; and a gas transmission member for transmitting the internal gas to the inside of the battery.

Optionally, in some embodiments of the present application, the gas delivery component comprises a first connection component, a second connection component, and a gas delivery sub-component; the first connecting component is used for being connected with a first interface of the battery in a sealing way; the second connecting component is used for being connected with a second interface of the battery in a sealing way; a gas delivery sub-assembly for extracting an internal gas through the first interface; the gas transmission sub-component is also used for conveying internal gas to the interior of the battery through the second interface.

Optionally, in some embodiments of the present application, the internal gas includes a first gas and a second gas, where the first gas is a gas generated by an internal chemical reaction of the battery cell, and the second gas is a gas generated by volatilization of the electrolyte, and the detecting component is further configured to detect the battery according to a concentration of the first gas and/or a concentration of the second gas.

Optionally, in some embodiments of the present application, the detecting component is further configured to detect a concentration of the first gas and/or a concentration of the second gas, and output the detection information according to a relationship between the concentration of the first gas and the first reference concentration, and/or a relationship between the concentration of the second gas and the second reference concentration.

Optionally, in some embodiments of the present application, the first gas includes a gas other than oxygen and nitrogen in a gas generated by an internal chemical reaction of a battery cell in the battery; the second gas includes a gas common to the gases in which the electrolyte is volatilized in the battery cells of the plurality of chemical systems.

Alternatively, in some embodiments of the present application, the first gas is a gas common to gases generated by internal chemical reactions of the battery cells of the multiple chemical systems.

Optionally, in some embodiments of the present application, the device for detecting a battery is applied to vibration testing of a battery, and the gas transmission component is further configured to extract internal gas of the battery when the battery is in a state of vibration testing.

Optionally, in some embodiments of the present application, the detection information includes a prompt signal, and the detection component is further configured to output the prompt signal when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value, and/or a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

Optionally, in some embodiments of the present application, the prompt signal includes a first early warning signal and/or a second early warning signal, and the detection unit is further configured to output the first early warning signal when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold; or the detection component is further used for outputting a second early warning signal when the difference value between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

Optionally, in some embodiments of the present application, the apparatus for detecting a battery further includes: and the recording component is used for recording the output time of the first early warning signal and the concentration of the first gas and/or the output time of the second early warning signal and the concentration of the second gas.

Optionally, in some embodiments of the present application, the detection information includes an alarm signal: the detection component is further used for outputting an alarm signal when the difference value between the concentration of the first gas and the first reference concentration is larger than or equal to a first preset threshold value and the difference value between the concentration of the second gas and the second reference concentration is larger than or equal to a second preset threshold value.

Optionally, in some embodiments of the present application, the detecting component is further configured to determine a concentration of the first gas in the battery as the first reference concentration prior to performing the vibration test on the battery; and/or determining the concentration of the second gas in the battery as the second reference concentration prior to performing the vibration test on the battery.

Optionally, in some embodiments of the present application, the first interface is a pressure relief mechanism on a casing of the battery, and the second interface is a high-low pressure interface on the casing of the battery.

Alternatively, in some embodiments of the present application, the time for the gas delivery member to withdraw the internal gas from the interior of the cell and the time for the internal gas to be delivered to the interior of the cell are equal.

In a third aspect, there is provided an apparatus for detecting a battery, the apparatus comprising a processor and a memory, the memory for storing a program, the processor for calling and running the program from the memory to detect a battery in the first aspect or any of the possible embodiments of the first aspect.

In a fourth aspect, there is provided a computer readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of detecting a battery of the first aspect or any of the possible embodiments of the first aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a method for detecting a battery according to an embodiment of the present application;

fig. 2 is a schematic structural view of a device for detecting a battery according to an embodiment of the present application;

FIG. 3 is a flow chart of another method of detecting a battery disclosed in an embodiment of the present application;

FIG. 4 is a block schematic diagram of an apparatus for detecting a battery according to an embodiment of the present application;

fig. 5 is a schematic diagram of a hardware configuration of a device for detecting a battery according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the embodiments of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the embodiment of the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, or the like, which is not limited in the embodiment of the present application. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited thereto.

In the embodiment of the application, the "chemical system" of the battery cell is divided according to the components of the positive electrode active material used in the positive electrode sheet in the battery cell, and the doping or cladding element or substance of the positive electrode active material is not limited. For example, a cell in which the positive active material is lithium iron phosphate (including Mn or V element doping) may be defined as a lithium iron phosphate chemical system cell. A battery cell in which the positive active material is lithium nickel cobalt manganese oxide (generally abbreviated as NCM) may be defined as an NCM chemical system battery cell.

For example, the chemical system of the battery cell can be further defined according to the relative content of nickel, cobalt and manganese in the positive electrode active material, for example, the positive electrode active material is LiNi _0.5 Co _0.2 Mn _0.3 O ₂ The battery cell (generally abbreviated as NCM 523) can be defined as NCM523 chemical system battery cell, and the positive electrode active material is LiNi _0.6 Co _0.2 Mn _0.2 O ₂ The battery cell (generally abbreviated as NCM 622) can be defined as NCM622 chemical system battery cell, and the positive electrode active material is LiNi _0.8 Co _0.1 Mn _0.1 O ₂ The (generally abbreviated as NCM 811) cell may be defined as an NCM811 chemical system cell.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery pack or the like. The battery generally includes a case for enclosing one or more battery cells. The case can reduce the influence of liquid or other foreign matters on the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate. The positive plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the current collector without the positive electrode active material layer protrudes out of the current collector coated with the positive electrode active material layer, and the current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the current collector without the negative electrode active material layer protrudes out of the current collector with the coated negative electrode active material layer, and the current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to reduce the probability of fusing when a large current is passed, the number of positive electrode tabs is plural and stacked together, and the number of negative electrode tabs is plural and stacked together. The material of the isolation film can be polypropylene (PP) or Polyethylene (PE). In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The battery cell further includes a case and an end cap, the case being according to a shape of one or more electrode assemblies combined, for example, the case may be a hollow rectangular parallelepiped or square or cylindrical body, and one of faces of the case has an opening so that one or more electrode assemblies may be placed in the case. For example, when the housing is a hollow rectangular parallelepiped or square, one of the flat surfaces of the housing is an open surface, i.e., the flat surface has no wall body so that the inside and outside of the housing communicate. When the shell can be a hollow cylinder, the end face of the shell is an opening face, i.e. the end face is not provided with a wall body, so that the inside and the outside of the shell are communicated. The end cap covers the opening of the receiving space and is connected with the case to form a cavity in which the electrode assembly is placed. And, be provided with the notes liquid hole on the end cover, pour into the electrolyte through this notes liquid hole to the battery monomer inside.

In order to improve the yield of the battery, various tests are generally required to be performed on the battery before the battery leaves the factory, for example, to detect whether electrolyte of a battery cell in the battery leaks.

In the related art, a leakage sensor is usually disposed in a box of a battery, and if an electrolyte leaked from a battery cell contacts the leakage sensor, the impedance of the leakage sensor will change, and then signal detection and processing are used to determine the leakage condition of the electrolyte in the battery cell.

However, by providing a leakage sensor inside the case of the battery, it is often necessary to open the case of the battery to provide a leakage sensor, which will destroy the airtight of the case in its initial state and affect the tests at other stages.

Based on the above-mentioned problems, the embodiments of the present application provide a method for detecting a battery, where the method detects the battery according to the acquired gas inside the battery and transmits the gas to the inside of the battery, so that not only can the condition of the battery be determined, but also the influence on the initial state of the box of the battery can be reduced, which is beneficial to the subsequent test of the battery.

Embodiments of the present application will be described in connection with the following drawings. As shown in fig. 1, the method of detecting a battery includes the following.

S110, acquiring the internal gas of the battery.

It will be appreciated that the internal gas may be obtained through an original interface on the housing of the battery. Wherein the type of the internal gas is related to the type of the battery. The types of cells vary from cell to cell and from cell to cell. For example, the internal gas may include at least one of carbon monoxide, carbon dioxide, oxygen, hydrogen, nitrogen, methane, ethane, acetylene, ethylene, propylene, propane, and organic volatilized gases.

And S120, detecting the battery according to the concentration of at least one gas in the internal gas.

For example, the battery may be inspected based on at least one of carbon monoxide, carbon dioxide, oxygen, hydrogen, nitrogen, methane, ethane, acetylene, ethylene, propylene, propane, and gases volatilized by the organics to determine an abnormal condition of the battery, for example, a slight damage, a moderate damage, or a serious damage of the battery cell.

And S130, conveying the internal gas into the battery.

It will be appreciated that in order to equalize the pressure inside the cell, a confirmed concentration of the internal gas may be delivered to the interior of the cell.

It will be appreciated that a portion of the internal gas is air and another portion is from the cells. The amount of gas from the battery cells in the case of the battery is affected by the condition of the battery cells. Thus, the abnormal condition of the battery can be determined according to the gas amount of the gas from the battery cell in the case of the battery.

Optionally, in some embodiments of the present application, the internal gas includes a first gas and a second gas, the first gas is a gas generated by an internal chemical reaction of the battery cell, and the second gas is a gas generated by volatilization of the electrolyte; detecting the battery based on the concentration of at least one gas in the internal gas, comprising: the cell is detected based on the concentration of the first gas and/or the concentration of the second gas.

It should be understood that the gas generated by the chemical reaction inside the battery cell is generally generated from a formation process in the production process of the battery cell or a charge and discharge process of the battery cell. Among them, gases generated by the chemical reaction inside the battery cell include, but are not limited to, carbon monoxide, carbon dioxide, oxygen, hydrogen, nitrogen, methane, ethane, acetylene, ethylene, propylene, propane, etc. The first gas may be at least one of carbon monoxide, carbon dioxide, oxygen, hydrogen, nitrogen, methane, ethane, acetylene, ethylene, propylene, and propane.

The gas in which the electrolyte is volatilized may be a gas in which an organic substance in the electrolyte is volatilized, for example, a gas in which ethylene carbonate (Ethylene Carbonate, EC) is volatilized, a gas in which methyl ethyl carbonate (Methyl Ethyl Carbonate, EMC) is volatilized, a gas in which dimethyl carbonate (Dimethyl Carbonate, DMC) is volatilized, and a gas in which diethyl carbonate (Diethyl Carbonate, DEC) is volatilized. The second gas may be at least one of a gas volatilized from ethylene carbonate, a gas volatilized from methyl ethyl carbonate, a gas volatilized from dimethyl carbonate, and a gas volatilized from diethyl carbonate.

For example, in the case where the battery cell is slightly damaged in the battery, for example, in the case where a crack in the case of the battery cell is relatively small and the electrolyte cannot pass through the crack, gas generated by the chemical reaction inside the battery cell may leak into the case of the battery through the small crack, and thus, the abnormal condition of the battery may be determined by the concentration of the first gas.

In the case of moderate damage or severe damage of the battery cell in the battery, for example, a crack of the case of the battery cell is large, both electrolyte and gas may leak into the case of the battery through the crack, whereby an abnormal condition of the battery may be determined by the second gas, or the first gas and the second gas.

Optionally, in some embodiments of the present application, detecting the battery based on the concentration of the first gas and/or the concentration of the second gas includes: detecting the concentration of the first gas and/or the concentration of the second gas; and outputting detection information according to the relation between the concentration of the first gas and the first reference concentration and/or the relation between the concentration of the second gas and the second reference concentration.

For example, the detection information may be output in the case where the concentration of the first gas is greater than the first reference concentration, and/or the concentration of the second gas is greater than the second reference concentration. Wherein the first reference concentration may be an empirical value determined from the concentration of the first gas in one or more cells of the same type, and the second reference concentration may also be an empirical value determined from the concentration of the second gas in one or more cells of the same type. The detection information includes, but is not limited to, the time at which the method of detecting the battery is operated, the absence of an abnormal condition of the battery, and information of the presence of an abnormal condition of the battery. The detection information may be in the form of text, an optical signal, or the like.

It will be appreciated that during injection of electrolyte into the cell, a portion of the electrolyte typically remains on the cell housing due to mechanical errors and/or artifacts, and that, since the cell is not in a 100% sealed condition, gases generated by chemical reactions within the cell will enter the cell housing from the cell, for example, through the gap of the sealing pin at the fill hole. Therefore, when the battery cell is not damaged, a part of the gas generated by volatilization of the electrolyte and the gas generated by chemical reaction inside the battery cell exist inside the battery.

It should be understood that the first gas may be all the gas generated by the self-discharge of the battery cells, or may be part of the gas generated by the self-discharge of the battery cells in the battery.

Among the cells of the various chemistry systems include, but are not limited to, lithium iron phosphate chemistry system cells, NCM chemistry system cells, lithium manganese iron phosphate chemistry system cells, sodium electrochemical system cells, lithium nickel cobalt aluminate chemistry system cells, and lithium titanate chemistry system cells.

It should be understood that the gas generated by the chemical reaction inside the battery includes the same gas as the composition of air, such as oxygen, nitrogen, and the like, and also includes the gas different from the composition of air, such as methane, carbon monoxide, and the like. Thus, the first gas may be at least one of carbon monoxide, methane, ethane, acetylene, ethylene, propylene, propane, and the like.

In the battery cells of various chemical systems, the components of the electrolyte are different. Illustrating: an electrolyte of a battery cell includes ethylene carbonate, ethylmethyl carbonate and diethyl carbonate; the electrolyte in another battery cell comprises ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate; the electrolyte in yet another cell includes ethylene carbonate and dimethyl carbonate. The second gas may be at least one of a gas volatilized from ethylene carbonate and a gas volatilized from dimethyl carbonate, and the second gas may be at least one of a gas volatilized from ethylene carbonate and a gas volatilized from ethylmethyl carbonate.

In the embodiment of the application, under the condition that the battery monomer is not damaged, a large amount of oxygen and nitrogen exist in the battery, so that the battery is detected according to the gas concentration of the gas except the oxygen and the nitrogen in the battery, and the detection sensitivity can be improved; and the method for detecting the battery improves the adaptability of the method for detecting the battery to the battery monomers of different chemical systems according to the gas common in the gases volatilized by the electrolyte in the battery monomers of the multiple chemical systems.

It should be appreciated that the gases generated by the internal chemical reactions of the battery cells of the different chemical systems may be different, and thus, the first gas may be set as a gas common to the gases generated by the internal chemical reactions of the battery cells of the multiple chemical systems, for example, at least one of methane and ethane.

The first gas may be determined when the battery is not detected, for example, a gas generated by chemical reactions inside a plurality of battery cells of different chemical systems may be collected, for example, a gas generated by chemical reactions inside a lithium iron phosphate chemical system battery cell and an NCM chemical system battery cell, and a gas common to a gas generated by chemical reactions inside a lithium iron phosphate chemical system battery cell and a gas generated by chemical reactions inside an NCM chemical system battery cell may be determined as the first gas.

Alternatively, the first gas is a gas having a larger amount of gas other than oxygen and nitrogen among gases common to gases generated by chemical reactions inside the battery cells of the plurality of chemical systems.

For example, the amount of carbon monoxide in the gas generated by the internal chemical reactions of most types of NCM chemical system battery cells (e.g., NCM622, NCM 523) is large, whereby the first gas can be set to carbon monoxide.

It should be noted that, the gas concentration of the same gas in the common gas generated by the self-discharge of the battery cells of different chemical systems may be different, for example, carbon monoxide generated by the self-discharge of some of the battery cells of NCM chemical system may be 20% to 30% of the total amount of the gas generated by the internal chemical reaction, and carbon monoxide generated by the self-discharge of the lithium iron phosphate battery may be about 5% of the total amount of the gas generated by the internal chemical reaction. If the first gas is carbon monoxide, less carbon monoxide is generated due to self-discharge of the lithium iron phosphate battery, and the damage condition of the battery cell can be further determined by the concentration of the second gas. Therefore, the damage condition of the battery monomers of various chemical systems can be determined without replacing a sensor for detecting the first gas, and the adaptability of the battery detection method to batteries of different chemical systems is improved.

It should be understood that the method of detecting a battery may be used alone or in combination with other battery tests.

For example, the battery may be fixed to a vibration jig, and vibration test may be performed on the battery according to vibration conditions, such as time, intensity, etc., of vibration. And, the vibration test requires that the electrolyte of the battery cell in the battery is not leaked during the vibration period.

In practical application, the internal gas of the battery can be extracted when the battery is in vibration; the internal gas of the battery may be extracted while the battery is in the vibration gap. The internal gas of the battery may be extracted without interruption, or may be extracted at regular intervals, for example, 5 minutes.

The first preset threshold value and the second preset threshold value can be experience values set in advance. The prompt signal is used for indicating the damage condition of the battery. For example, the first preset threshold and the second preset threshold may be any value from 90ppm to 110 ppm. For example, 90ppm, 91ppm, 92ppm, 94ppm, 96ppm, 98ppm, 100ppm, 102ppm, 104ppm, 106ppm, 108ppm, 110ppm, etc.

If the difference between the concentration of the first gas and the first reference is greater than or equal to a first preset threshold value, and the difference between the concentration of the second gas and the second reference is less than a second preset threshold value, the method can indicate that the battery monomer in the battery is slightly damaged; if the difference between the concentration of the first gas and the first reference is smaller than a first preset threshold value, and the difference between the concentration of the second gas and the second reference is larger than or equal to a second preset threshold value, the method can indicate that the battery cell in the battery is damaged or the like; if the difference between the concentration of the first gas and the first reference is greater than or equal to the first preset threshold value, and the difference between the concentration of the second gas and the second reference is greater than or equal to the second preset threshold value, the serious damage of the battery cell in the battery can be indicated.

It should be understood that in the embodiment of the present application, the form of the prompt signal is not limited, and may be, for example, an acoustic signal, an optical signal, a text signal, and the like. The same indication signal may be used to indicate the damage of the battery, or a different indication signal may be used to indicate the damage of the battery.

Optionally, in some embodiments of the present application, the prompt signal includes a first early warning signal and/or a second early warning signal, and the first early warning signal is output when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold; or outputting a second early warning signal when the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

The first early warning signal and the second early warning signal are different, and the first early warning signal can be used for indicating that a battery cell in a battery is slightly damaged, and the second early warning signal can be used for indicating that the battery cell in the battery is damaged, and the like. The forms of the first warning signal and the second warning signal are not limited, and may be, for example, sound signals or optical signals.

In practical application, under the condition of outputting the early warning signal, the vibration test of the battery is maintained.

In the embodiment of the application, the detection result is conveniently determined by the detection personnel through the first early warning signal and the second early warning signal, so that the abnormal condition of the battery is determined. And corresponding measures can be taken according to the abnormal condition of the battery, so that the failure probability of the battery is reduced.

Optionally, in some embodiments of the present application, the method of detecting a battery further comprises: recording the concentration of the first gas and the output time of the first early warning signal; or the concentration of the second gas and the time of the second warning signal output.

For example, the concentration of the first gas and the time of the first warning signal output may be recorded and stored by the storage means; or recording and storing the concentration of the second gas and the output time of the second early warning signal.

Optionally, in some embodiments of the present application, the prompting signal includes an alarm signal, and outputting the prompting signal when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value, and/or a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value, including: and outputting an alarm signal when the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value and the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

The alarm signal is used for indicating that the battery monomer in the battery is seriously damaged. The form of the alarm signal is not limited, and may be, for example, an audio signal or an optical signal, or may be a combined signal including an audio signal and an optical signal.

In practical application, under the condition of outputting an alarm signal, the vibration test of the battery is stopped, and a detector can disassemble the battery to confirm the position of the damage of the battery monomer. For example, after the battery is disassembled, the gas detection device may cruise to detect an abnormal surge point of the first gas concentration and/or the second gas concentration, and the penetrating agent may be used to confirm a crack region of the battery cell.

The alarm signal, the first alarm signal and the second alarm signal are different signals. For example, the first and second warning signals are light signals and the warning signal is a sound signal.

Optionally, in some embodiments of the present application, obtaining the internal gas of the battery includes: extracting internal gas of the battery through a first interface of the battery; delivering the internal gas to the interior of the cell includes: and delivering an internal gas to the interior of the battery through the second port of the battery. Therefore, the internal gas of the battery can be obtained without adding a new design on the battery, so that the abnormal condition of the battery can be conveniently detected, and the cost for detecting the battery is reduced.

The first interface and the second interface may be the same interface on the battery box, or may be different interfaces on the battery box.

The pressure relief mechanism can be in the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve and the like, and the high-pressure port and the low-pressure port are used for electric connection.

Optionally, in some embodiments of the present application, the method of detecting a battery further comprises: determining a concentration of a first gas in the battery as a first reference concentration prior to performing a vibration test on the battery; and/or determining the concentration of the second gas in the battery as the second reference concentration prior to performing the vibration test on the battery.

For example, the internal gas of the battery may be extracted and the concentration of the first gas in the internal gas may be determined as the first reference concentration and/or the concentration of the second gas may be determined as the second reference concentration before the battery is fixed on the vibration jig and the vibration test is not started.

Optionally, in some embodiments of the present application, the time to deliver the internal gas to the interior of the cell is equal to the time to extract the internal gas of the cell. Thus, the balance of the pressure in the case of the battery can be maintained, and the damage to the battery can be reduced.

For example, as shown in fig. 2, the explosion-proof valve plug 210 may be in sealing connection with the explosion-proof valve 201 on the case 200, the gas-filling tool 220 may be in sealing connection with the high-low pressure port 202 on the case 200, and the automatic gas-pumping pump 230 and the gas detector 240 may be disposed between the explosion-proof valve plug 210 and the gas-filling tool 220. The explosion-proof valve plug 210, the automatic exhaust pump 230, the gas detector 240 and the inflation tool 220 can be connected through a gas pipe 250.

In actual operation, the diaphragm can reciprocate through the circular motion of the motor in the automatic exhaust pump 230, so that the air in the compression and stretching pump cavity forms negative pressure, a pressure difference is generated between the air extraction opening and the external atmospheric pressure, the interior of the battery is sucked into the pump cavity under the action of the pressure difference and then is exhausted from the exhaust port, the gas enters the gas detector, and after the concentration of the first gas and/or the second gas is detected by the gas detector, the internal gas in the gas detector 240 is conveyed into the battery through the automatic exhaust pump 230. Wherein, the time of pumping and the time of exhausting can be controlled to be equal by controlling the automatic pumping and exhausting pump 230 so as to maintain the balance of the pressure in the box body of the battery.

The gas detector 240 may be a laser detector, or may be integrated with an integrated gas detection module, for example, a detector for detecting a volatilized gas of ethylene carbonate and a detector for detecting carbon monoxide.

For the convenience of understanding of those skilled in the art, as shown in fig. 3, the present application also proposes a specific embodiment.

S310, before the vibration test is performed on the battery, the explosion-proof valve plug 210 is connected to the explosion-proof valve 201 on the battery case 200, and the inflation fixture 220 is connected to the high-low pressure port 202 on the battery case 200.

And S320, fixing the battery on the vibration clamp.

S330, acquiring the internal gas of the battery in real time to detect the damage condition of the battery monomer.

S340, starting vibration test.

S350, judging that the difference value between the concentration of the first gas and the first reference concentration is larger than or equal to a first preset threshold value; or alternatively, the process may be performed,

the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold.

S351, if the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold, a first early warning signal is sent, and the concentration of the first gas and the output time of the first early warning signal are recorded.

And S352, if the difference value between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value, a second early warning signal is sent, and the concentration of the second gas and the output time of the second early warning signal are recorded.

S360, judging that the difference value between the concentration of the first gas and the first reference concentration is larger than or equal to a first preset threshold value; and, in addition, the processing unit,

And S370, if yes, sending an alarm signal, and stopping the vibration test.

S380, disassembling the box body of the battery, and confirming the crack position of the battery monomer.

In addition to the method for detecting a battery described in the above embodiments, as shown in fig. 4, the present application further proposes an apparatus 400 for detecting a battery, where the apparatus 400 includes: a gas transmission part 410 for acquiring an internal gas of the battery; a detection part 420 for detecting the battery according to the concentration of at least one gas in the internal gas; the gas delivery component 410 also serves to deliver internal gas to the interior of the cell.

Optionally, in some embodiments of the present application, the gas delivery component 410 includes a first connection component, a second connection component, and a gas delivery sub-component; the first connecting component is used for being connected with a first interface of the battery in a sealing way; the second connecting component is used for being connected with a second interface of the battery in a sealing way; a gas delivery sub-assembly for extracting an internal gas through the first interface; the gas transmission sub-component is also used for conveying internal gas to the interior of the battery through the second interface.

Alternatively, in some embodiments of the present application, the time for the gas delivery component 410 to draw the internal gas from the interior of the cell is equal to the time for delivering the internal gas to the interior of the cell.

Optionally, in some embodiments of the present application, the internal gas includes a first gas and a second gas, where the first gas is a gas generated by an internal chemical reaction of a battery cell in the battery, and the second gas is a gas generated by volatilization of an electrolyte in the battery, and the detecting component 420 is further configured to detect the battery according to a concentration of the first gas and/or a concentration of the second gas.

Optionally, in some embodiments of the present application, the detecting component 420 is further configured to detect a concentration of the first gas and/or a concentration of the second gas, and output detection information according to a relationship between the concentration of the first gas and the first reference concentration, and/or a relationship between the concentration of the second gas and the second reference concentration.

Optionally, in some embodiments of the present application, the first gas is a gas other than oxygen and nitrogen in a gas generated by an internal chemical reaction of a battery cell in the battery; the second gas is a gas common to the gases in which the electrolyte is volatilized in the battery cells of the plurality of chemical systems.

Optionally, in some embodiments of the present application, the apparatus 400 is applied to vibration testing of a battery, and the gas transmission part 410 is further configured to extract internal gas of the battery in a case that the battery is in a state of vibration testing.

Optionally, in some embodiments of the present application, the detection information includes a prompt signal, and the detection component 420 is further configured to output the prompt signal when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value, and/or a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

Optionally, in some embodiments of the present application, the prompt signal includes a first early warning signal and/or a second early warning signal, and the detecting unit 420 is further configured to output the first early warning signal when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold; or the early warning component is used for outputting a second early warning signal under the condition that the difference value between the concentration of the second gas and the second reference concentration is larger than or equal to a second preset threshold value.

Optionally, in some embodiments of the present application, the apparatus 400 further comprises: a recording part for recording the concentration of the first gas and the output time of the first early warning signal; or a recording part for recording the concentration of the second gas and the output time of the second early warning signal.

Optionally, in some embodiments of the present application, the detection information includes an alarm signal, and the detection component 420 is further configured to output the alarm signal when a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value, and a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

Optionally, in some embodiments of the present application, the detecting component 420 is further configured to determine a concentration of the first gas in the battery as the first reference concentration prior to performing the vibration test on the battery; and/or determining the concentration of the second gas in the battery as the second reference concentration prior to performing the vibration test on the battery.

Fig. 5 is a schematic diagram of a hardware configuration of a device for detecting a battery according to an embodiment of the present application. The battery detection apparatus 500 shown in fig. 5 includes a memory 501, a processor 502, a communication interface 503, and a bus 504. The memory 501, the processor 502, and the communication interface 503 are communicatively connected to each other via a bus 504.

The memory 501 may be a read-only memory (ROM), a static storage device, and a random access memory (random access memory, RAM). The memory 501 may store a program which, when executed by the processor 502, the processor 502 and the communication interface 503 are adapted to perform the steps of the method of detecting a battery of the embodiments of the present application.

The processor 502 may employ a general-purpose central processing unit (central processing unit, CPU), microprocessor, application specific integrated circuit (application specific integrated circuit, ASIC), graphics processor (graphics processing unit, GPU) or one or more integrated circuits for executing associated programs to perform functions required by the units in the apparatus for detecting a battery of the embodiments of the present application or to perform the methods for detecting a battery of the embodiments of the present application.

The processor 502 may also be an integrated circuit chip with signal processing capabilities. In implementation, various steps of the method for detecting a battery of the embodiments of the present application may be accomplished by instructions in the form of integrated logic circuits or software of hardware in the processor 502.

The processor 502 may also be a general purpose processor, a digital signal processor (digital signal processing, DSP), an ASIC, an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 501, and the processor 502 reads information in the memory 501, and in combination with hardware thereof, performs functions required to be performed by a unit included in the apparatus for detecting a battery according to the embodiment of the present application, or performs the method for detecting a battery according to the embodiment of the present application.

The communication interface 503 enables communication between the apparatus 500 and other devices or communication networks using a transceiving apparatus such as, but not limited to, a transceiver. For example, traffic data for unknown devices may be obtained through the communication interface 503.

Bus 504 may include a path to transfer information between various components of device 500 (e.g., memory 501, processor 502, communication interface 503).

It should be noted that although the apparatus 500 described above only shows a memory, a processor, a communication interface, in a particular implementation, those skilled in the art will appreciate that the apparatus 500 may also include other devices necessary to achieve proper operation. Also, as will be appreciated by those skilled in the art, the apparatus 500 may also include hardware devices that implement other additional functions, as desired. Furthermore, it will be appreciated by those skilled in the art that the apparatus 500 may also include only the devices necessary to implement the embodiments of the present application, and not necessarily all of the devices shown in fig. 5.

The embodiments also provide a computer readable storage medium storing program code for device execution, the program code comprising instructions for performing the steps in the method of detecting a battery described above.

The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

It should be noted that, the device for detecting a battery and the computer readable storage medium provided in the foregoing embodiments of the present application can respectively implement the corresponding detection of a battery in the foregoing method embodiments, and have the beneficial effects of the corresponding method embodiments, and the relevant description may refer to the foregoing method embodiments and will not be repeated herein.

It will be clear to those skilled in the art that, for convenience and brevity of description, reference may be made to the corresponding process in the foregoing method embodiment for the specific working process of the apparatus described above, which is not described herein again.

In the description of the present application, it is to be noted that the meaning of "plurality" is two or more unless otherwise indicated. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A method of detecting a battery, the method comprising:

acquiring the internal gas of the battery;

detecting the battery according to the concentration of at least one gas in the internal gas;

delivering the internal gas to the interior of the cell.

2. The method of claim 1, wherein the internal gas comprises a first gas and a second gas, the first gas being a gas generated by a chemical reaction within the cell, the second gas being a gas generated by volatilization of an electrolyte; the detecting the battery according to the concentration of at least one gas in the internal gas comprises:

and detecting the battery according to the concentration of the first gas and/or the concentration of the second gas.

3. The method of claim 2, wherein detecting the battery based on the concentration of the first gas and/or the concentration of the second gas comprises:

detecting a concentration of the first gas and/or a concentration of the second gas;

outputting detection information according to the relation between the concentration of the first gas and the first reference concentration and/or the relation between the concentration of the second gas and the second reference concentration.

4. The method of claim 2, wherein the first gas comprises a gas other than oxygen or nitrogen among gases generated by chemical reactions within the battery cells; the second gas includes a gas common to the gases in which the electrolyte is volatilized in the battery cells of the plurality of chemical systems.

5. The method of claim 4, wherein the first gas is a gas common to gases produced by internal chemical reactions of the cells of the plurality of chemical systems.

6. A method according to claim 3, wherein the method is applied to vibration testing of the battery, and the obtaining the internal gas of the battery comprises: and extracting the internal gas of the battery under the condition that the battery is in a vibration test state.

7. The method of claim 6, wherein the detection information includes a prompt signal, and wherein outputting the detection information based on a relationship between the concentration of the first gas and a first reference concentration and/or a relationship between the concentration of the second gas and a second reference concentration includes:

and outputting the prompt signal under the condition that the difference value between the concentration of the first gas and the first reference concentration is larger than or equal to a first preset threshold value and/or the difference value between the concentration of the second gas and the second reference concentration is larger than or equal to a second preset threshold value.

8. The method according to claim 7, wherein the alert signal comprises a first alert signal and/or a second alert signal, and wherein outputting the alert signal when the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold and/or the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold comprises:

outputting the first early warning signal under the condition that the difference value between the concentration of the first gas and the first reference concentration is larger than or equal to a first preset threshold value; or alternatively, the process may be performed,

and outputting the second early warning signal under the condition that the difference value between the concentration of the second gas and the second reference concentration is larger than or equal to a second preset threshold value.

9. The method of claim 7, wherein the alert signal comprises an alarm signal, and wherein outputting the alert signal if the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold and/or the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold comprises:

And outputting an alarm signal when the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value and the difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

10. The method of claim 8, wherein the method further comprises:

recording the output time of the first early warning signal and the concentration of the first gas, and/or recording the output time of the second early warning signal and the concentration of the second gas.

11. The method of claim 6, wherein the method further comprises:

determining a concentration of the first gas in the battery as the first reference concentration prior to performing a vibration test on the battery; and/or the number of the groups of groups,

the concentration of the second gas in the battery is determined to be the second reference concentration prior to vibration testing of the battery.

12. The method of claim 1, wherein the obtaining the internal gas of the battery comprises:

extracting internal gas of the battery through a first interface of the battery;

said delivering said internal gas to the interior of said cell comprises:

And delivering the internal gas to the interior of the battery through a second interface of the battery.

13. The method of claim 12, wherein the first interface is a pressure relief mechanism on a housing of the battery and the second interface is a high-low pressure interface on the housing of the battery.

14. The method of any one of claims 1-13, wherein the time to deliver the internal gas to the interior of the cell is equal to the time to extract the internal gas of the cell.

15. An apparatus for detecting a battery, the apparatus comprising:

a gas transmission member for acquiring an internal gas of the battery;

a detection means for detecting the battery based on a concentration of at least one gas in the internal gas;

the gas transmission component is also used for conveying the internal gas to the interior of the battery.

16. The apparatus of claim 15, wherein the gas delivery component comprises a first connection component, a second connection component, and a gas delivery sub-component;

the first connecting component is used for being connected with a first interface of the battery in a sealing way;

the second connecting component is used for being connected with a second interface of the battery in a sealing way;

The gas delivery subassembly for extracting the internal gas through the first interface;

the gas delivery subassembly is further configured to deliver the internal gas to the interior of the cell through the second interface.

17. The apparatus according to claim 15, wherein the internal gas includes a first gas and a second gas, the first gas is a gas generated by a chemical reaction inside the battery cell, the second gas is a gas generated by volatilization of the electrolyte, and the detecting means is further configured to detect the battery based on a concentration of the first gas and/or a concentration of the second gas.

18. The apparatus according to claim 17, wherein the detection means is further for detecting a concentration of the first gas and/or a concentration of the second gas; and outputting detection information according to the relation between the concentration of the first gas and the first reference concentration and/or the relation between the concentration of the second gas and the second reference concentration.

19. The apparatus of claim 17, wherein the first gas comprises a gas other than oxygen or nitrogen among gases generated by chemical reactions within the battery cells; the second gas includes a gas common to the gases in which the electrolyte is volatilized in the battery cells of the plurality of chemical systems.

20. The apparatus of claim 19, wherein the first gas is a gas common to gases generated by internal chemical reactions of the battery cells of the plurality of chemical systems.

21. The apparatus according to claim 18, wherein the apparatus is applied to a vibration test of the battery, and the gas transmission means is further for extracting an internal gas of the battery in a state where the battery is in the vibration test.

22. The apparatus according to claim 21, wherein the detection information includes a prompt signal, and the detection means is further configured to output the prompt signal if a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold value, and/or if a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold value.

23. The device according to claim 22, wherein the prompt signal comprises a first pre-warning signal and/or a second pre-warning signal, the detection means being further configured to output the first pre-warning signal if the difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold; or alternatively, the process may be performed,

The detection component is further configured to output the second early warning signal when a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold.

24. The apparatus of claim 23, wherein the apparatus further comprises:

and the recording component is used for recording the concentration of the first gas and the output time of the first early warning signal and/or the concentration of the second gas and the output time of the second early warning signal.

25. The apparatus of claim 22, wherein the alert signal comprises an alarm signal, the detection component further configured to output the alarm signal if a difference between the concentration of the first gas and the first reference concentration is greater than or equal to a first preset threshold and a difference between the concentration of the second gas and the second reference concentration is greater than or equal to a second preset threshold.

26. The apparatus of claim 21, wherein the detection means is further for determining a concentration of the first gas in the battery as the first reference concentration prior to performing a vibration test on the battery; and/or the number of the groups of groups,

27. The device of claim 16, wherein the first interface is a pressure relief mechanism on a housing of the battery and the second interface is a high-low pressure interface on the housing of the battery.

28. The apparatus of any one of claims 15-27, wherein the gas delivery means draws the internal gas from the interior of the cell for equal time and delivers the internal gas to the interior of the cell.

29. An apparatus for detecting a battery, the apparatus comprising a processor and a memory, the memory for storing a program, the processor for calling and running the program from the memory to perform the method of any one of claims 1 to 14.

30. A computer readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 14.