CN115327400A - Lithium analysis detection device and method for lithium battery and module - Google Patents

Abstract

The present application discloses a lithium precipitation detection device and method for a lithium battery and a module, wherein the lithium precipitation detection device for a lithium battery includes a detection module, a battery management system and an early warning module, wherein the detection module is used for real-time detection specific gas concentration, and provide the detected specific gas concentration to the battery management system; the battery management system is connected with the detection module and the early warning module, and is used to obtain the lithium precipitation threshold level according to the specific gas concentration, and determine the Describe whether the lithium precipitation threshold level has reached the lithium precipitation warning level, and if the judgment result is that the lithium precipitation prewarning level has been reached, generate early warning information and send it to the early warning module for early warning. The present application can accurately detect whether the lithium battery has precipitated lithium.

Description

Lithium analysis detection device and method for lithium battery and module

technical field

The present application relates to the technical field of battery management, in particular to a lithium analysis detection device and method for lithium batteries and modules.

Background technique

With the vigorous development of the new energy market, the safety issues of new energy products, such as electric vehicles and electric motorcycles, have increasingly attracted people's attention. The safety of new energy products mainly focuses on the safety of lithium batteries. In the safety of lithium batteries, lithium ionization in lithium batteries is a non-negligible reason that may cause thermal runaway of lithium batteries. Lithium deposition in lithium batteries will lead to a decrease in thermal stability. When the lithium dendrites caused by lithium deposition penetrate the separator and cause an internal short circuit, it will lead to irreversible thermal safety events.

At present, the detection method for lithium analysis of lithium batteries is mainly based on the difference in capacity, internal resistance, static voltage, and pressure before and after lithium analysis. The above-mentioned method has great requirements on the amount of lithium analysis, and it is difficult to judge the difference due to equipment precision and other reasons when the amount of lithium analysis is small. Therefore, the current judgment method is difficult to put into use in new energy products.

The foregoing description is provided to provide general background information and does not necessarily constitute prior art.

Contents of the invention

The purpose of the present application is to provide a lithium battery and module lithium analysis detection device and method, which can accurately detect whether the lithium battery has lithium analysis.

In order to achieve the above object, the technical solution of the present application is achieved in this way:

In the first aspect, the embodiment of the present application provides a lithium battery detection device for lithium analysis, including: a detection module, a battery management system and an early warning module, wherein;

The detection module is used to detect the specific gas concentration in real time, and provide the detected specific gas concentration to the battery management system;

The battery management system is connected with the detection module and the early warning module, and is used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level has reached the lithium analysis early warning level. Early warning level, after the early warning information is generated, it is sent to the early warning module for early warning prompts.

As one of the implementations, the detection module is arranged inside the lithium battery, between the negative electrode of the lithium battery and the separator, and the separator separates the electrolyte from the negative electrode of the lithium battery.

As one of the implementation manners, the detection module is a gas sensor, and the early warning module adopts a combination meter of a vehicle.

As one of the implementations, the battery management system includes a slave board and a main board connected to the slave board, the slave board is used to send the specific gas concentration provided by the detection module to the main board, and the main board It is used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level has reached the lithium analysis early warning level. If the judgment result is that the lithium analysis early warning level has been reached, the early warning information is generated and sent to the early warning module for early warning prompts .

As one of the implementations, it also includes a remote communication module and a server connected to the battery management system, and the battery management system is also used to provide early warning information to the server through the remote communication module, and the server is responsible for the The early warning information is analyzed and processed; the server is also used to contact the user terminal to prompt the user according to the early warning information provided by the remote communication module, or contact the vehicle rescue team and emergency accident team to deal with vehicle failures.

As one of the implementations, it also includes a vehicle controller connected to the battery management system, the battery management system is also used to send early warning information to the vehicle controller, and the vehicle controller is used to The early warning information controls the whole vehicle to slow down.

In the second aspect, the embodiment of the present application provides a lithium battery module detection device for lithium analysis, including: the lithium battery detection device for lithium analysis, a lithium battery module includes a plurality of lithium batteries, and the detection module is correspondingly set Multiple, each detection module is set inside a lithium battery, each detection module is used for real-time detection of a specific gas concentration, and provides the detected specific gas concentration to the battery management system, the battery management system and the detection The module is connected to the early warning module, and is used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level has reached the lithium analysis early warning level. An early warning prompt is given to the early warning module.

In the third aspect, the embodiment of the present application provides a method for detecting lithium analysis of a lithium battery, including: a detection module detects a specific gas concentration in real time, and provides the detected specific gas concentration to the battery management system;

The battery management system obtains the lithium analysis threshold level according to the specific gas concentration, and judges whether the lithium analysis threshold level has reached the lithium analysis warning level. If the judgment result is that the lithium analysis warning level has been reached, the early warning information is generated and sent to the early warning module for early warning hint.

The beneficial effects brought by the technical solutions provided by the embodiments of the present application are:

The lithium battery and module lithium analysis detection device and method provided in the embodiments of the present application detect the specific gas concentration in real time through the detection module, and provide the detected specific gas concentration to the battery management system; the battery management system according to the specific gas concentration Obtain the lithium analysis threshold level, judge whether the lithium analysis threshold level reaches the lithium analysis early warning level, if the judgment result reaches the lithium analysis early warning level, then generate early warning information and send it to the early warning module for early warning prompts. This application has no obvious demand for the amount of lithium analysis, nor does it have requirements for the reasons for lithium analysis. By setting up a detection module inside the lithium battery, the amount of gas can be accurately detected, and the degree of lithium analysis can be quantitatively determined by the amount of gas, so that Carry out different processing, grade and more accurately carry out battery lithium analysis safety warning.

Description of drawings

Fig. 1 is the block diagram of the lithium analysis detection device of the lithium battery that the embodiment of the present application provides;

Fig. 2 is the structural representation of lithium battery and detection module of the present application;

FIG. 3 is a block diagram of a lithium analysis detection device for a lithium battery provided in another embodiment of the present application;

FIG. 4 is a block diagram of a lithium analysis detection device for a lithium battery provided in another embodiment of the present application;

5 is a block diagram of a lithium analysis detection device for a lithium battery module provided in another embodiment of the present application;

6 is a schematic flow diagram of a lithium battery analysis and detection method for lithium batteries provided in an embodiment of the present application;

FIG. 7 is a schematic flow chart of a lithium battery detection method for lithium analysis provided by another embodiment of the present application.

Detailed ways

The technical solution of the present application will be further elaborated below in combination with the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

Fig. 1 is a block diagram of a lithium analysis detection device for a lithium battery provided in an embodiment of the present application. The lithium analysis detection device of the lithium battery can accurately detect whether the lithium battery has released lithium. Referring to FIG. 1 , the lithium battery detection device for lithium analysis in this embodiment includes: a detection module 10 , a battery management system (BMS, Battery Management System) 11 and an early warning module 12 .

Specifically, the detection module 10 is connected to the battery management system 11 for real-time detection of a specific gas concentration (such as hydrogen concentration), and provides the detected specific gas concentration to the battery management system 11 . The specific gas is a gas related to lithium analysis, such as hydrogen.

As shown in Figure 2, the detection module 10 can be arranged inside the lithium battery, between the negative electrode 101 of the lithium battery and the separator 102, the separator 102 separates the electrolyte from the negative electrode 101 of the lithium battery, and the electrolyte is located in the lithium battery. Between the positive electrode 103 and the separator 102, the detection module 10 can be a gas sensor, which can detect the concentration of hydrogen around the lithium battery in real time.

The battery management system 11 is connected with the detection module 10 and the early warning module 12, and is used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level has reached the lithium analysis early warning level, if the judgment result reaches the lithium analysis early warning level , the early warning information is generated and sent to the early warning module 12 for early warning prompts.

The battery management system 11 is the controller of the high-voltage power battery, which can detect the status of each component inside the high-voltage power battery, including battery cell voltage, module voltage, total battery voltage, current, temperature, battery insulation and other parameters, and also control And coordinate the work of the internal components of the high-voltage power battery, and it is also used to obtain the threshold level of lithium analysis according to the specific gas concentration (such as hydrogen concentration).

Specifically, the battery management system 11 can obtain the lithium analysis threshold level according to the corresponding relationship between the specific gas concentration (such as hydrogen concentration), the specific gas concentration (such as hydrogen concentration) and the lithium analysis threshold level, and judge whether it has reached the lithium analysis threshold level according to the lithium analysis threshold level. alert level.

The lithium analysis threshold level can include 0 level, 1 level, 2 level, 3 level, etc. The corresponding relationship between the specific gas concentration (such as hydrogen concentration) and the lithium analysis threshold level includes: the hydrogen concentration is less than 0.1ppm (volume concentration unit) is 0 level, Indicates that lithium has not been precipitated, and the hydrogen concentration is between 0.1ppm-0.3ppm, which is grade 1, indicating that a small amount of lithium is precipitated, but no treatment is required. Monitoring or early warning, hydrogen concentration greater than 0.5ppm is level 3, which means a large amount of lithium is deposited, and the battery needs to be recalled and disassembled. The lithium analysis warning level can be set to level 3, and the warning information can include the lithium analysis threshold level (for example, level 3), hydrogen concentration (for example, 0.6ppm), and suggested treatment methods (for example, the battery cannot be used any longer, please recall the battery dismantling) etc.

In the lithium battery production process, a gas sensor can be installed between the negative electrode and the diaphragm of the lithium battery, and the hydrogen concentration value of the gas sensor is uploaded to the battery management system 11, and the battery management system 11 records the hydrogen value between the batteries before the lithium battery is put into the market , such as Appm. During the use of the battery, the hydrogen concentration of the battery can be monitored in real time. When the hydrogen concentration reaches a threshold level of 3, it is determined that a large amount of lithium has been deposited, and the battery needs to be recalled for disassembly.

The early warning module 12 may be an instrument cluster module (ICM, Instrument Cluster Module) of the vehicle. The combination instrument is an instrument in the passenger compartment of the vehicle, which is used to display early warning information to the driver, such as the threshold level of lithium analysis (such as level 3), the concentration of hydrogen gas (such as 0.6ppm), the recommended treatment method (for example, the battery cannot continue to be used, Please recall the battery for disassembly), etc.

Preferably, as shown in FIG. 3, the battery management system 11 may include a slave board 110 and a main board 111 connected to the slave board 110. The slave board 110 is used to collect battery cell voltage, temperature, determine the validity of the signal, and balance the battery. Functions, etc., are also used to send the specific gas concentration provided by the detection module 10 to the main board. The main board 111 is used to collect the total battery voltage, insulation detection, etc., and is responsible for processing the cell voltage and temperature collected from the board. It is also used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level has reached the lithium analysis warning. Level, if the judgment result reaches the lithium analysis early warning level, then generate early warning information and send it to the early warning module 12 for early warning prompts. This application makes use of the characteristics of the metal lithium in the lithium analysis battery reacting with the solvent in the electrolyte to generate a trace amount of hydrogen, and adds a gas sensor inside the lithium battery to detect the amount of hydrogen to identify abnormalities. This application has no analysis on the amount of lithium There is an obvious need, and there is no requirement for the cause of lithium analysis. The amount of lithium analysis can be identified according to the amount of gas generated in different levels, and the degree of lithium analysis can be quantitatively determined by the amount of lithium analysis, and then different treatments can be carried out more accurately. , Accurately graded battery lithium analysis safety warning.

Preferably, as shown in FIG. 4 , the lithium battery detection device for lithium analysis may further include a remote communication module (TEL, Telematics system) 40 and a server 41 connected to the battery management system.

The battery management system 11 is also used to transmit the early warning information to the server 41 through the remote communication module 40, and the server 41 analyzes and processes the early warning information for data monitoring.

The remote communication module 40 can upload data to the server 41 for analysis and processing by the server 41 for data monitoring. The remote communication module 40 may be a wireless communication module.

The server 41 can be arranged in the data monitoring center of the car company. The server 41 is also used to contact the user terminal to prompt the user according to the early warning information provided by the remote communication module, such as interacting with the user's mobile phone APP (that is, sending and receiving instructions with the user's mobile phone APP), such as sending information to the user's mobile phone, etc. , can also be used for data analysis, processing, storage, etc., and can also contact the vehicle rescue team and emergency accident team to deal with vehicle failure and other matters.

Preferably, as shown in FIG. 4 , the lithium battery detection device for lithium analysis may further include a vehicle control unit (VCU, Vehicle Control Unit) 43 connected to the battery management system.

The battery management system 11 is also used to send the warning information to the vehicle controller 43, and the vehicle controller 43 is used to control the vehicle to slow down according to the warning information.

The vehicle controller 43 is the control center of multiple functions of the vehicle. It makes logical judgments on multiple functions, sends instructions to many components of the vehicle, and controls them, including the high-voltage power supply, high-voltage power supply, emergency The decision-making and control of high-voltage electricity, charging, driving and other functions are also used to control the vehicle to slow down according to the early warning information, so as to wait for the accident to be dealt with.

Based on the same concept as the foregoing embodiments, the embodiment of the present application provides a lithium battery module lithium analysis detection device, as shown in Figure 5, the lithium battery module lithium analysis detection device includes the lithium battery in the above embodiment Lithium analysis device. A lithium battery module 50 includes a plurality of lithium batteries 51, and a plurality of detection modules are set correspondingly, and each detection module is arranged inside a lithium battery, and each detection module is used for real-time detection of a specific gas concentration, and the detected specific gas concentration Provided to the battery management system, the battery management system is connected with the detection module and the early warning module, and is used to obtain the lithium analysis threshold level according to a specific gas concentration (for example, it can be the maximum value of a specific gas concentration), and judge the Describe whether the lithium analysis threshold level reaches the lithium analysis early warning level, if the judgment result is to reach the lithium analysis early warning level, then generate early warning information and send it to the early warning module for early warning prompts. Because there are multiple detection modules, the maximum value of the specific gas concentration must be obtained at this time to calculate the threshold level of lithium analysis. For example, if there are 3 detection modules, the detected specific gas concentrations are 0.1ppm, 0.2ppm, and 0.5ppm, respectively. According to the maximum value of 0.5ppm and the corresponding relationship between the specific gas concentration and the lithium analysis threshold level, the lithium analysis threshold level is 2.

Preferably, each detection module is located between a negative electrode of a lithium battery and a separator, and the separator separates the electrolyte from the negative electrode of the lithium battery.

Preferably, each detection module can be a gas sensor, and the early warning module adopts a combination instrument of the vehicle.

Preferably, the battery management system includes a slave board and a main board connected to the slave board, the slave board is used to send the specific gas concentration provided by the detection module to the main board, and the main board is used to The gas concentration (such as the maximum value of the specific gas concentration) obtains the lithium analysis threshold level, and judges whether the lithium analysis threshold level reaches the lithium analysis early warning level, and if the judgment result reaches the lithium analysis early warning level, then generates early warning information and sends it to the The early warning module provides early warning prompts.

Preferably, the lithium analysis detection device of the lithium battery module further includes a remote communication module and a server connected to the battery management system, and the battery management system is also used to provide early warning information to the server through the remote communication module, so The server analyzes and processes the early warning information; the server is also used to contact the user terminal to prompt the user according to the early warning information provided by the remote communication module, or contact the vehicle rescue team and emergency accident team to deal with vehicle failures.

Preferably, the lithium analysis detection device of the lithium battery module further includes a vehicle controller connected to the battery management system, and the battery management system is also used to send early warning information to the vehicle controller, and the vehicle controller The vehicle controller is used to control the vehicle to slow down according to the early warning information.

In summary, the lithium battery and the lithium analysis detection device of the module provided by the embodiment of the present application detect the specific gas concentration in real time through the detection module, and provide the detected specific gas concentration to the battery management system; the battery management system according to The lithium analysis threshold level is obtained for the specific gas concentration, and it is judged whether the lithium analysis threshold level has reached the lithium analysis early warning level. If the judgment result is that the lithium analysis early warning level has been reached, the early warning information is generated and sent to the early warning module for early warning prompts. This application has no obvious demand for the amount of lithium analysis, nor does it have requirements for the reasons for lithium analysis. By setting up a detection module inside the lithium battery, the amount of gas can be accurately detected, and the degree of lithium analysis can be quantitatively determined by the amount of gas, so that Carry out different processing, grade and more accurately carry out battery lithium analysis safety warning.

The following are method embodiments of the present application. For details not described in detail in the method embodiments, reference may be made to the above-mentioned corresponding device embodiments.

FIG. 6 is a schematic flowchart of a lithium analysis detection method for a lithium battery provided in an embodiment of the present application. Please refer to Fig. 6, the lithium analysis detection method of the lithium battery is applied to the lithium analysis detection device of the lithium battery, the lithium analysis detection device of the lithium battery can be realized by software and/or hardware, in this embodiment, the described The lithium analysis lithium detection method of lithium battery comprises the following steps:

In step S601, the detection module detects the specific gas concentration in real time, and provides the detected specific gas concentration to the battery management system.

Step S602, the battery management system obtains the lithium analysis threshold level according to the specific gas concentration, and judges whether the lithium analysis threshold level reaches the lithium analysis early warning level, and if the judgment result reaches the lithium analysis early warning level, generates early warning information and sends it to the early warning The module gives an early warning prompt.

As shown in FIG. 7, after step S602, step S701 may also be included.

Step S701, the battery management system also provides early warning information to the server through the remote communication module, and the server analyzes and processes the early warning information; the server also contacts the user terminal according to the early warning information provided by the remote communication module To prompt the user, or contact the vehicle rescue team and emergency accident team to deal with vehicle failure.

Preferably, after the step S602, a step may also be included: the battery management system also sends warning information to the vehicle controller, and the vehicle controller controls the vehicle to slow down according to the warning information.

Preferably, the detection module is arranged inside the lithium battery, between the negative electrode of the lithium battery and the diaphragm, and the diaphragm separates the electrolyte from the negative electrode of the lithium battery. The detection module is a gas sensor, and the early warning module adopts a combination instrument of the vehicle. The battery management system includes a slave board and a main board connected to the slave board, the slave board is used to send the specific gas concentration provided by the detection module to the main board, and the main board is used to obtain the specific gas concentration according to the specific gas concentration Analyze the lithium threshold level, judge whether the lithium analysis threshold level reaches the lithium analysis early warning level, if the judgment result reaches the lithium analysis early warning level, then generate early warning information and send it to the early warning module for early warning prompts.

To sum up, the method for detecting lithium analysis of lithium batteries provided by the embodiment of the present application detects the specific gas concentration in real time through the detection module, and provides the detected specific gas concentration to the battery management system; the battery management system according to the specific gas concentration Obtain the lithium analysis threshold level, judge whether the lithium analysis threshold level reaches the lithium analysis early warning level, if the judgment result reaches the lithium analysis early warning level, then generate early warning information and send it to the early warning module for early warning prompts. This application has no obvious demand for the amount of lithium analysis, nor does it have requirements for the reasons for lithium analysis. By setting up a detection module inside the lithium battery, the amount of gas can be accurately detected, and the degree of lithium analysis can be quantitatively determined by the amount of gas, so that Carry out different processing, grade and more accurately carry out battery lithium analysis safety warning.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element. In addition, different implementations of the present application Components, features, and elements with the same name in the example may have the same meaning, or may have different meanings, and the specific meaning shall be determined based on the explanation in the specific embodiment or further combined with the context in the specific embodiment.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this document, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word "if" as used herein may be interpreted as "at" or "when" or "in response to a determination". Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising", "comprising" indicate the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not exclude one or more other features, steps, operations, The existence, occurrence or addition of an element, component, item, species, and/or group. The terms "or" and "and/or" as used herein are to be construed as inclusive, or to mean either one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C" . Exceptions to this definition will only arise when combinations of elements, functions, steps or operations are inherently mutually exclusive in some way.

It should be understood that although the various steps in the flow chart in the embodiment of the present application are displayed sequentially as indicated by the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figure may include multiple sub-steps or multiple stages, these sub-steps or stages are not necessarily executed at the same time, but may be executed at different times, and the execution order is not necessarily sequential Instead, it may be performed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (10)

1. A lithium battery analysis lithium detection device, characterized in that, comprising: a detection module, a battery management system and an early warning module, wherein; The detection module is used to detect the specific gas concentration in real time, and provide the detected specific gas concentration to the battery management system; The battery management system is connected with the detection module and the early warning module, and is used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level has reached the lithium analysis early warning level. Early warning level, after the early warning information is generated, it is sent to the early warning module for early warning prompts. 2. The device according to claim 1, wherein the detection module is arranged inside the lithium battery, between the negative electrode of the lithium battery and the diaphragm, and the diaphragm separates the electrolyte from the negative electrode of the lithium battery. 3. The device according to claim 1, wherein the detection module is a gas sensor, and the early warning module adopts a combination instrument of a vehicle. 4. The device according to claim 1, wherein the battery management system comprises a slave board and a main board connected to the slave board, and the slave board is used to send the specific gas concentration provided by the detection module to For the main board, the main board is used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level reaches the lithium analysis early warning level, and if the judgment result reaches the lithium analysis early warning level, then generate early warning information and send An early warning prompt is given to the early warning module. 5. The device according to claim 1, further comprising a remote communication module and a server connected to the battery management system, and the battery management system is also used to provide early warning information to the Server, the server analyzes and processes the early warning information; the server is also used to contact the user terminal to prompt the user according to the early warning information provided by the remote communication module, or contact the vehicle rescue team and emergency accident team to handle Vehicle breakdown. 6. The device according to claim 1, further comprising a vehicle controller connected to the battery management system, the battery management system is further configured to send early warning information to the vehicle controller, The vehicle controller is used to control the vehicle to slow down according to the warning information. 7. A lithium battery module analysis lithium detection device, characterized in that it comprises: the lithium battery analysis lithium detection device as claimed in any one of claims 1-6, a lithium battery module includes a plurality of For the lithium battery, multiple detection modules are set correspondingly, and each detection module is set inside a lithium battery, and each detection module is used to detect a specific gas concentration in real time, and provide the detected specific gas concentration to the battery management system, the The battery management system is connected with the detection module and the early warning module, and is used to obtain the lithium analysis threshold level according to the specific gas concentration, and judge whether the lithium analysis threshold level reaches the lithium analysis early warning level, and if the judgment result reaches the lithium analysis early warning level , the early warning information is generated and sent to the early warning module for early warning prompts. 8. A lithium battery analysis lithium detection method, characterized in that, comprising: The detection module detects the specific gas concentration in real time, and provides the detected specific gas concentration to the battery management system; The battery management system obtains the lithium analysis threshold level according to the specific gas concentration, and judges whether the lithium analysis threshold level has reached the lithium analysis warning level. If the judgment result is that the lithium analysis warning level has been reached, the early warning information is generated and sent to the early warning module for early warning hint. 9. The method of claim 8, further comprising: The battery management system also provides early warning information to the server through the remote communication module, and the server analyzes and processes the early warning information; the server also contacts the user terminal to prompt the user according to the early warning information provided by the remote communication module , or contact the vehicle rescue team and emergency accident team to deal with vehicle failures. 10. The method of claim 8, further comprising: The battery management system also sends early warning information to the vehicle controller, and the vehicle controller controls the vehicle to slow down according to the early warning information.

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