Method and device for determining mass of carbon monoxide released during thermal runaway of lithium ion battery

Abstract

Provided are a method and device for determining the mass of carbon monoxide released during thermal runaway of a lithium ion battery. The method comprises: acquiring a battery state of charge (SOC) corresponding to a lithium ion battery when thermal runaway occurs; determining a mass loss value of the lithium ion battery before and after the thermal runaway and determining the thermal runaway duration of the lithium ion battery; on the basis of the SOC and the mass loss value, determining first mass of carbon monoxide released during the thermal runaway of the lithium ion battery; on the basis of the SOC and the thermal runaway duration, determining second mass of carbon monoxide released during the thermal runaway of the lithium ion battery; and carrying out weighted summation on the first mass and the second mass to obtain the total mass of carbon monoxide released during the thermal runaway of the lithium ion battery.

Description

Method and device for determining the mass of carbon monoxide released during thermal runaway of lithium-ion batteries

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 2023117996095 and application date December 26, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present disclosure relates to the field of lithium-ion battery safety technology, and in particular to a method, device, equipment, and storage medium for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery. Background Art

[0004] At present, with the continuous development of lithium-ion battery energy storage technology, its safety issues are becoming increasingly prominent. Among them, the most representative problem is the thermal runaway of lithium-ion batteries caused by various abuses. Thermal runaway can lead to the release of a large amount of hazardous flammable gases and toxic gases, endangering people's lives. One of the toxic gases is carbon monoxide. Therefore, after the thermal runaway of the lithium-ion battery, how to determine the total mass of carbon monoxide produced by the lithium-ion battery is extremely important to ensure the safety of the lithium-ion battery. Summary of the Invention

[0005] The first objective of the present disclosure is to provide a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway, so as to determine the total mass of carbon monoxide generated after a lithium-ion battery undergoes thermal runaway.

[0006] A second objective of the present disclosure is to provide a device for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery.

[0007] A third objective of the present disclosure is to provide an electronic device.

[0008] A fourth object of the present disclosure is to provide a computer-readable storage medium.

[0009] A fifth object of the present disclosure is to provide a computer program product.

[0010] A sixth object of the present disclosure is to provide a computer program.

[0011] To achieve the above objectives, an embodiment of the first aspect of the present disclosure provides a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway, comprising: obtaining the battery state of charge (SOC) corresponding to the thermal runaway of the lithium-ion battery; determining the mass loss value of the lithium-ion battery before and after the thermal runaway; determining the duration of the thermal runaway of the lithium-ion battery; determining a first mass of carbon monoxide released by the lithium-ion battery after the thermal runaway based on the SOC and the mass loss value; determining a second mass of carbon monoxide released by the lithium-ion battery after the thermal runaway based on the SOC and the duration of the thermal runaway; and performing a weighted summation of the first mass and the second mass to obtain the total mass of carbon monoxide released by the lithium-ion battery after the thermal runaway. Determining the mass loss value before and after the thermal runaway of the lithium-ion battery comprises:

[0012] Obtaining an average mass of the electrolyte in the lithium-ion battery, an actual ambient pressure corresponding to thermal runaway of the lithium-ion battery, and an average temperature of the lithium-ion battery when thermal runaway ends;

[0013] Determining a mass loss value of the lithium-ion battery before and after thermal runaway according to the average mass, the actual ambient pressure, the average temperature, and the SOC;

[0014] The mass loss value of the lithium-ion battery before and after thermal runaway is obtained according to the following formula:

[0015] Among them, m loss Indicates the mass loss value; m sol represents the average mass of the electrolyte in the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; x represents the SOC; Tc represents the average temperature of the lithium-ion battery when the thermal runaway ends;

[0016] Determining the thermal runaway duration of the lithium-ion battery includes:

[0017] Obtaining the thickness of the shortest side of the lithium-ion battery, the heating power of the battery surface, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery, and the maximum SOC that the lithium-ion battery can reach after the thermal runaway;

[0018] The thermal runaway duration of the lithium-ion battery is determined according to the thickness, the actual ambient pressure, the heating power of the battery surface, the maximum SOC, and the SOC.

[0019] In some embodiments, the thermal runaway duration of the lithium-ion battery is obtained according to the following formula: Among them, the T loss Indicates the duration of thermal runaway; L wrepresents the thickness of the shortest side of the lithium-ion battery; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; W represents the heating power of the battery surface; x c represents the maximum SOC.

[0020] In some embodiments, the first mass is obtained according to the following formula: co1 =p+p L w +E l x 2 +E h m loss 2 +x c xm loss ; Among them, m co1 represents the first mass; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; L w represents the thickness of the shortest side of the lithium-ion battery; E h Indicates the maximum voltage of the lithium-ion battery when it is fully charged; E l Indicates the minimum voltage of the lithium-ion battery when it is fully discharged; x c Indicates the maximum SOC that a lithium-ion battery can reach after thermal runaway; m loss represents the mass loss value; x represents the SOC.

[0021] In some embodiments, the second mass is obtained according to the following formula: Among them, m co2 represents the second mass; E h Indicates the maximum voltage of the lithium-ion battery when it is fully charged; E l Indicates the minimum voltage of the lithium-ion battery when it is fully discharged; L w represents the thickness of the shortest side of the lithium-ion battery; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; p0 represents the standard atmospheric pressure; x represents the SOC; T loss represents the duration of thermal runaway; m represents the average mass of the battery.

[0022] To achieve the above-mentioned purpose, the second embodiment of the present disclosure proposes a device for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway, comprising: a first acquisition module for acquiring the battery state of charge (SOC) corresponding to the thermal runaway of the lithium-ion battery; a mass loss value module for determining the mass loss value of the lithium-ion battery before and after the thermal runaway; a thermal runaway duration module for determining the thermal runaway duration of the lithium-ion battery; a first determination module for determining a first mass of carbon monoxide released after the thermal runaway of the lithium-ion battery according to the SOC and the mass loss value; a second determination module for determining the thermal runaway duration of the lithium-ion battery according to the SOC and the thermal runaway duration. a second mass of carbon monoxide released after the thermal runaway of the lithium-ion battery; a weighted summation module, configured to perform a weighted summation on the first mass and the second mass to obtain the total mass of carbon monoxide released after the thermal runaway of the lithium-ion battery; the mass loss value module, specifically configured to: obtain the average mass of the electrolyte in the lithium-ion battery, the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery, and the average temperature of the lithium-ion battery at the end of the thermal runaway; determine the mass loss value of the lithium-ion battery before and after the thermal runaway according to the average mass, the actual ambient pressure, the average temperature, and the SOC; the mass loss value of the lithium-ion battery before and after the thermal runaway is obtained according to the following formula:

[0023] Among them, m loss Indicates the mass loss value; m sol represents the average mass of the electrolyte in the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; x represents the SOC; Tc represents the average temperature of the lithium-ion battery when the thermal runaway ends;

[0024] The thermal runaway duration module is specifically used to:

[0025] Obtaining the thickness of the shortest side of the lithium-ion battery, the heating power of the battery surface, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery, and the maximum SOC that the lithium-ion battery can reach after the thermal runaway;

[0026] The thermal runaway duration of the lithium-ion battery is determined according to the thickness, the actual ambient pressure, the heating power of the battery surface, the maximum SOC, and the SOC.

[0027] To achieve the above-mentioned objectives, an embodiment of the third aspect of the present disclosure proposes an electronic device, comprising: a housing, a processor, a memory, a circuit board and a power supply circuit, wherein the circuit board is placed inside the space enclosed by the housing, and the processor and the memory are arranged on the circuit board; the power supply circuit is used to supply power to various circuits or devices of the above-mentioned electronic device; the memory is used to store executable program code; the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, and is used to execute the method for determining the mass of carbon monoxide released by thermal runaway of a lithium-ion battery as described in the first aspect.

[0028] To achieve the above-mentioned objectives, the fourth embodiment of the present disclosure proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the mass of carbon monoxide released by a lithium-ion battery due to thermal runaway as described in the first aspect.

[0029] To achieve the above-mentioned objectives, the fifth embodiment of the present disclosure proposes a computer program product. When the instructions in the computer program product are executed by a processor, the method for determining the mass of carbon monoxide released by a lithium-ion battery due to thermal runaway as described in the first aspect is implemented.

[0030] To achieve the above-mentioned purpose, the sixth embodiment of the present disclosure proposes a computer program, which includes computer program code. When the computer program code is run on a computer, the computer executes the method for determining the mass of carbon monoxide released by thermal runaway of a lithium-ion battery as described in the first aspect.

[0031] The disclosed embodiments provide a method, apparatus, electronic device, storage medium, computer program product, and computer program for determining the mass of carbon monoxide released from a lithium-ion battery during thermal runaway. The method first obtains the battery state of charge (SOC) corresponding to the lithium-ion battery during thermal runaway; determines the mass loss value before and after the thermal runaway of the lithium-ion battery, as well as the duration of the thermal runaway of the lithium-ion battery; determines a first mass of carbon monoxide released from the lithium-ion battery after thermal runaway based on the SOC and the mass loss value; determines a second mass of carbon monoxide released from the lithium-ion battery after thermal runaway based on the SOC and the duration of the thermal runaway; and performs a weighted summation of the first mass and the second mass to obtain the total mass of carbon monoxide released from the lithium-ion battery after thermal runaway. This effectively determines the total mass of carbon monoxide released from the lithium-ion battery after thermal runaway, provides personnel with specific data on the total mass of carbon monoxide released, and facilitates subsequent personnel in determining the safety of the lithium-ion battery after thermal runaway based on the determined total mass of carbon monoxide.

[0032] Additional aspects and advantages of the present disclosure will be given in part in the description below and in part will be obvious from the description below, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] FIG1 is a flow chart showing a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway according to an embodiment of the present disclosure;

[0035] FIG2 shows a second flow chart of a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway according to an embodiment of the present disclosure;

[0036] FIG3 shows a third flow chart of a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway according to an embodiment of the present disclosure;

[0037] FIG4 is a schematic structural diagram of a device for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway according to an embodiment of the present disclosure;

[0038] FIG5 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The following describes embodiments of the present disclosure in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present disclosure, and should not be understood to limit the present disclosure.

[0040] The following describes a method and apparatus for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway according to an embodiment of the present disclosure with reference to the accompanying drawings.

[0041] FIG1 shows a flow chart of a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway according to an embodiment of the present disclosure.

[0042] As shown in FIG1 , the method for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery includes the following steps:

[0043] Step 101: Obtain the battery state of charge (SOC) corresponding to the thermal runaway of the lithium-ion battery.

[0044] It should be noted that the method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway provided in the embodiments of the present disclosure can be performed by a device for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway, wherein the device for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway can be implemented by software and / or hardware. The device for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway can be an electronic device, or can be configured in an electronic device. The embodiments of the present disclosure are described using the example of a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway being configured in an electronic device.

[0045] In some embodiments, the electronic device can be any device with computing capabilities, such as a personal computer, a mobile terminal, a server, etc. The mobile terminal can be, for example, a vehicle-mounted device, a mobile phone, a tablet computer, a personal digital assistant, a wearable device, and other hardware devices with various operating systems, touch screens and / or display screens.

[0046] In some embodiments, the battery state of charge (SOC) refers to the available state of the remaining charge in the battery.

[0047] Step 102: Determine the mass loss value of the lithium-ion battery before and after thermal runaway.

[0048] In an embodiment of the present disclosure, the mass loss value of the lithium ion battery before and after thermal runaway can be determined based on the mass value of the lithium ion battery before thermal runaway and the mass value of the lithium ion battery after thermal runaway.

[0049] Step 103: Determine the thermal runaway duration of the lithium-ion battery.

[0050] In some embodiments, the thermal runaway duration refers to the time from the start of thermal runaway to the end of thermal runaway in the lithium-ion battery.

[0051] Step 104 : determining a first mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the mass loss value.

[0052] In some embodiments, after obtaining the SOC and mass loss values, the SOC and mass loss values ​​may be input into a formula for calculating the first mass of carbon monoxide to determine the first mass of carbon monoxide released after thermal runaway of the lithium-ion battery.

[0053] In some embodiments, it is understood that the formula for calculating the first mass of carbon monoxide is pre-set.

[0054] For example, the formula for calculating the first mass of carbon monoxide is expressed as m co1 =p+p L w +E l x 2 +Eh m loss 2 +x c xm loss , where m co1 represents the first mass; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; L w Indicates the thickness of the shortest side of the lithium-ion battery; E h Indicates the maximum voltage of a lithium-ion battery when it is fully charged; E l Indicates the minimum voltage of a lithium-ion battery when it is fully discharged; x c Indicates the maximum SOC that a lithium-ion battery can reach after thermal runaway; m loss represents the mass loss value; x represents SOC.

[0055] In one embodiment of the present disclosure, the thickness of the shortest side of the lithium-ion battery, the maximum voltage of the lithium-ion battery when fully charged, the minimum voltage of the lithium-ion battery when fully discharged, and the maximum SOC that can be achieved after thermal runaway of the lithium-ion battery can be obtained from the battery parameters of the lithium-ion battery.

[0056] In one embodiment of the present disclosure, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery may be obtained from the external condition parameters of the lithium-ion battery.

[0057] For example, x c It can be expressed as the maximum SOC that a lithium-ion battery can reach after being charged to thermal runaway at 0.1C (rate), p can be taken as 103473.2Pa (pressure), L w The value can be 2.5cm (cm), E h The value can be 3.85V (volts), E l The value can be 2.79V (volts), m loss The loss value can be B, correspondingly, when obtaining x c ,p,E h 、m loss and E l After that, you can use x c ,p,m loss 、E h and E l Substitute the above formula for calculating the first mass of carbon monoxide to obtain the first mass of carbon monoxide released after the lithium-ion battery has thermal runaway.

[0058] Step 105 : determining a second mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the thermal runaway duration.

[0059] In some embodiments, after obtaining the SOC and the thermal runaway duration, the SOC and the thermal runaway duration may be input into a formula for calculating the second mass of carbon monoxide to determine the second mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway.

[0060] In some embodiments, it is understood that the formula for calculating the second mass of carbon monoxide is pre-set.

[0061] For example, the formula for calculating the second mass of carbon monoxide is expressed as Among them, m co2 Indicates the second mass; E h Indicates the maximum voltage of a lithium-ion battery when it is fully charged; E l Indicates the minimum voltage of a lithium-ion battery when it is fully discharged; L w represents the thickness of the shortest side of the lithium-ion battery; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; p0 represents the standard atmospheric pressure; x represents SOC; T loss represents the duration of thermal runaway; m represents the average mass of the battery.

[0062] In one embodiment of the present disclosure, the thickness of the shortest side of the lithium-ion battery, the maximum voltage of the lithium-ion battery when fully charged, and the minimum voltage of the lithium-ion battery when fully discharged can be obtained from the battery parameters of the lithium-ion battery.

[0063] In one embodiment of the present disclosure, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery may be obtained from the external condition parameters of the lithium-ion battery.

[0064] For example, p can be set to 103473.2Pa (pressure), p0 can be set to 100000Pa (pressure), L w The value can be 2.5cm (cm), E h The value can be 3.85V (volts), E l The value can be 2.79V (volts), m can be 1800g (grams), T loss The duration of thermal runaway can be A. Correspondingly, when obtaining p0, p, E h 、T loss 、E l , m and E l After that, p0, p, E h 、T loss 、E l , m and E l Substitute the above formula for calculating the second mass of carbon monoxide to obtain the second mass of carbon monoxide released after thermal runaway of the lithium-ion battery.

[0065] Step 106 : performing a weighted summation on the first mass and the second mass to obtain the total mass of carbon monoxide released after the lithium-ion battery has thermal runaway.

[0066] In the embodiment of the present disclosure, based on the above formulas for calculating the first mass and the second mass, it can be determined that the formula for calculating the total mass of carbon monoxide released after thermal runaway of the lithium-ion battery can be expressed as:

[0067] In the formula, w1 represents a first weight preset for the first quality, and w2 represents a second weight preset for the second quality.

[0068] In an embodiment of the present disclosure, after obtaining the first mass and the second mass, a first weight corresponding to the first mass and a second weight corresponding to the second mass can be obtained, and the first mass is weighted using the first weight to obtain a weighted first mass, and the second mass is weighted according to the second weight to obtain a weighted second mass, and the weighted first mass and second mass are summed to obtain the total mass of carbon monoxide released after thermal runaway of the lithium-ion battery.

[0069] For example, m co＝ 0.3*m co1 +0.7*m co2 , where m co Represents the total mass of carbon monoxide released after thermal runaway of lithium-ion batteries, m co1 Indicates the first mass, m co2 represents the second mass, 0.3 represents the first weight corresponding to the first mass, and 0.7 represents the second weight corresponding to the second mass.

[0070] The disclosed embodiments provide a method for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway. The method first obtains the battery state of charge (SOC) corresponding to the thermal runaway state of the lithium-ion battery; determines the mass loss value before and after the thermal runaway state of the lithium-ion battery and the duration of the thermal runaway state of the lithium-ion battery; determines a first mass of carbon monoxide released by the lithium-ion battery after the thermal runaway state based on the SOC and the mass loss value; determines a second mass of carbon monoxide released by the lithium-ion battery after the thermal runaway state based on the SOC and the duration of the thermal runaway state; and performs a weighted summation of the first mass and the second mass to obtain the total mass of carbon monoxide released by the lithium-ion battery after the thermal runaway state. This method effectively determines the total mass of carbon monoxide released by the lithium-ion battery after thermal runaway, provides personnel with specific data on the total mass of carbon monoxide released, and facilitates subsequent personnel in determining the safety of the lithium-ion battery after thermal runaway based on the determined total mass of carbon monoxide.

[0071] Based on the above embodiment, in order to clearly understand how to determine the mass loss value and determine the first mass of carbon monoxide released after thermal runaway of the lithium-ion battery based on the SOC and the mass loss value, the method of this embodiment is further exemplarily described below with reference to FIG2 .

[0072] FIG2 is a second flow chart of a method for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery provided by an embodiment of the present disclosure.

[0073] As shown in FIG2 , the method for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery may include the following steps:

[0074] Step 201: Obtain the battery state of charge (SOC) corresponding to the thermal runaway of the lithium-ion battery.

[0075] Step 202 : Obtain the average mass of the electrolyte in the lithium-ion battery, the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery, and the average temperature of the lithium-ion battery when the thermal runaway ends.

[0076] In one embodiment of the present disclosure, the average mass of the electrolyte in the lithium-ion battery and the average temperature of the lithium-ion battery when thermal runaway ends can be obtained from the battery parameters of the lithium-ion battery.

[0077] In one embodiment of the present disclosure, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery may be obtained from the external condition parameters of the lithium-ion battery.

[0078] Step 203 : determining the mass loss value of the lithium-ion battery before and after thermal runaway based on the average mass, actual ambient pressure, average temperature, and SOC.

[0079] In some embodiments, after obtaining the average mass, actual ambient pressure, average temperature, and SOC, the average mass, actual ambient pressure, average temperature, and SOC may be input into a formula for calculating a mass loss value to determine the mass loss value before and after thermal runaway of the lithium-ion battery.

[0080] In some embodiments, it is understood that the formula for calculating the mass loss value is pre-set.

[0081] For example, the formula for calculating the mass loss value is Among them, m loss Indicates the mass loss value; m sol represents the average mass of the electrolyte in the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; x represents the SOC; Tc represents the average temperature of the lithium-ion battery when the thermal runaway ends.

[0082] For example, p can be 103473.2Pa (pressure), m solThe value can be 90g (grams), Tc can be 270℃ (degrees Celsius), and correspondingly, when obtaining p and m sol After Tc, p, m sol Substitute Tc and Tc into the above formula for calculating the mass loss value to obtain the mass loss value before and after thermal runaway of the lithium-ion battery.

[0083] Step 204 : determining a first mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the mass loss value.

[0084] Step 205 : Determine the duration of thermal runaway of the lithium-ion battery.

[0085] Step 206 : Determine a second mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the thermal runaway duration.

[0086] Step 207 : performing a weighted summation on the first mass and the second mass to obtain the total mass of carbon monoxide released after the lithium-ion battery has thermal runaway.

[0087] It should be noted that, for the detailed description of steps 204 to 207 , please refer to the relevant description in the embodiment of the present disclosure, which will not be repeated here.

[0088] Based on the above embodiment, in order to clearly understand how to determine the thermal runaway duration and determine the second mass of carbon monoxide released after the thermal runaway of the lithium-ion battery based on the SOC and the thermal runaway duration, the method of this embodiment is further exemplarily described below with reference to FIG3 .

[0089] FIG3 is a third flow chart of a method for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery provided by an embodiment of the present disclosure.

[0090] As shown in FIG3 , the method for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery may include the following steps:

[0091] Step 301: Obtain the battery state of charge (SOC) corresponding to the thermal runaway of the lithium-ion battery.

[0092] Step 302 : Determine the mass loss value of the lithium-ion battery before and after thermal runaway.

[0093] It should be noted that, for the specific description of steps 301 to 302, please refer to the relevant description in the embodiment of the present disclosure, which will not be repeated here.

[0094] Step 303 : Obtain the thickness of the shortest side of the lithium-ion battery, the heating power of the battery surface, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery, and the maximum SOC that the lithium-ion battery can reach after the thermal runaway.

[0095] In one embodiment of the present disclosure, the thickness of the shortest side of the lithium-ion battery and the heating power of the battery surface can be obtained from the battery parameters of the lithium-ion battery.

[0096] In one embodiment of the present disclosure, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery may be obtained from the external condition parameters of the lithium-ion battery.

[0097] Step 304 : Determine the thermal runaway duration of the lithium-ion battery based on the thickness, actual ambient pressure, battery surface heating power, maximum SOC, and SOC.

[0098] In some embodiments, the thickness, actual ambient pressure, battery surface heating power, maximum SOC, and SOC are obtained and input into a formula for calculating the thermal runaway duration to determine the thermal runaway duration before and after the thermal runaway of the lithium-ion battery.

[0099] In some embodiments, it is understood that the formula for calculating the thermal runaway duration is pre-set.

[0100] For example, the formula for calculating the duration of thermal runaway is Among them, T loss Indicates the duration of thermal runaway; L w represents the thickness of the shortest side of the lithium-ion battery; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; W represents the heating power of the battery surface; x c Indicates the maximum SOC.

[0101] In some embodiments, it can be understood that p can be taken as 103473.2 Pa (pressure), W can be taken as 500 W / h (watts / hour), and Lw can be taken as 2.5 cm (centimeter). Correspondingly, after obtaining p, W and Lw, p, W and Lw can be substituted into the above formula for calculating the thermal runaway duration to obtain the thermal runaway duration before and after the thermal runaway of the lithium-ion battery.

[0102] Step 305 : determining a first mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the mass loss value.

[0103] Step 306 : Determine a second mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the thermal runaway duration.

[0104] Step 307 : performing a weighted summation on the first mass and the second mass to obtain the total mass of carbon monoxide released after the lithium-ion battery has thermal runaway.

[0105] It should be noted that, for the detailed description of steps 305 to 307 , please refer to the relevant description of the embodiment of the present disclosure, which will not be repeated here.

[0106] In order to implement the above embodiments, the present disclosure further proposes a device for determining the mass of carbon monoxide released by a lithium-ion battery during thermal runaway.

[0107] FIG4 is a schematic structural diagram of a device for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery provided by an embodiment of the present disclosure.

[0108] As shown in FIG4 , the apparatus 400 for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery includes: a first acquisition module 401 , a mass loss value module 402 , a thermal runaway duration module 403 , a first determination module 404 , a second determination module 405 , and a weighted summation module 406 .

[0109] The first acquisition module 401 is used to obtain the battery state of charge (SOC) corresponding to the thermal runaway of the lithium-ion battery;

[0110] The mass loss value module 402 is used to determine the mass loss value of the lithium-ion battery before and after thermal runaway;

[0111] The thermal runaway duration module 403 is used to determine the thermal runaway duration of the lithium-ion battery;

[0112] A first determining module 404 is configured to determine a first mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the mass loss value;

[0113] A second determining module 405 is configured to determine a second mass of carbon monoxide released after the lithium-ion battery experiences thermal runaway based on the SOC and the thermal runaway duration;

[0114] The weighted summation module 406 is configured to perform a weighted summation on the first mass and the second mass to obtain a total mass of carbon monoxide released after thermal runaway of the lithium-ion battery.

[0115] In one embodiment of the present disclosure, the quality loss value module 402 is specifically configured to:

[0116] Obtain the average mass of the electrolyte in the lithium-ion battery, the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery, and the average temperature at the end of the thermal runaway of the lithium-ion battery;

[0117] The mass loss value of the lithium-ion battery before and after thermal runaway is determined based on the average mass, actual ambient pressure, average temperature and SOC.

[0118] In one embodiment of the present disclosure, the mass loss value of the lithium-ion battery before and after thermal runaway is obtained according to the following formula:

[0119] Among them, m loss Indicates the mass loss value; m sol represents the average mass of the electrolyte in the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; x represents the SOC; Tc represents the average temperature of the lithium-ion battery when the thermal runaway ends.

[0120] In one embodiment of the present disclosure, the thermal runaway duration module 403 is specifically configured to:

[0121] Obtain the thickness of the shortest side of the lithium-ion battery, the heat power on the battery surface, the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery, and the maximum SOC that the lithium-ion battery can reach after thermal runaway;

[0122] Determine the thermal runaway duration of lithium-ion batteries based on thickness, actual ambient pressure, battery surface heating power, maximum SOC and SOC.

[0123] In one embodiment of the present disclosure, the thermal runaway duration of a lithium-ion battery is obtained according to the following formula:

[0124] Among them, T loss Indicates the duration of thermal runaway; L w represents the thickness of the shortest side of the lithium-ion battery; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; W represents the heating power of the battery surface; x c Indicates the maximum SOC.

[0125] In one embodiment of the present disclosure, the first determining module 404 is specifically configured to:

[0126] Determine the first mass, which is obtained according to the following formula: m co1 =p+p L w +E l x 2 +E h m loss 2 +x c xm loss

[0127] Among them, m co1 represents the first mass; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; L w Indicates the thickness of the shortest side of the lithium-ion battery; E h Indicates the maximum voltage of a lithium-ion battery when it is fully charged; E l Indicates the minimum voltage of a lithium-ion battery when it is fully discharged; x cIndicates the maximum SOC that a lithium-ion battery can reach after thermal runaway; m loss represents the mass loss value; x represents SOC.

[0128] In one embodiment of the present disclosure, the second mass is obtained according to the following formula:

[0129] Among them, m co2 Indicates the second mass; E h Indicates the maximum voltage of a lithium-ion battery when it is fully charged; E l Indicates the minimum voltage of a lithium-ion battery when it is fully discharged; L w represents the thickness of the shortest side of the lithium-ion battery; p represents the actual environmental pressure corresponding to the thermal runaway of the lithium-ion battery; p0 represents the standard atmospheric pressure; x represents SOC; T loss represents the duration of thermal runaway; m represents the average mass of the battery.

[0130] It should be noted that the above explanation of the embodiment of the method for determining the mass of carbon monoxide released by a lithium-ion battery due to thermal runaway is also applicable to the device for determining the mass of carbon monoxide released by a lithium-ion battery due to thermal runaway in this embodiment, and will not be repeated here.

[0131] In the disclosed embodiment, the battery state of charge (SOC) corresponding to the thermal runaway of the lithium-ion battery is first obtained; the mass loss value of the lithium-ion battery before and after thermal runaway is determined, as well as the duration of thermal runaway of the lithium-ion battery are determined; a first mass of carbon monoxide released after thermal runaway is determined based on the SOC and mass loss value; a second mass of carbon monoxide released after thermal runaway is determined based on the SOC and the duration of thermal runaway; and a weighted sum of the first mass and the second mass is taken to obtain the total mass of carbon monoxide released after thermal runaway. This effectively determines the total mass of carbon monoxide released after thermal runaway of the lithium-ion battery, provides personnel with specific data on the total mass of carbon monoxide released, and ensures the safety of the lithium-ion battery after thermal runaway.

[0132] In order to implement the above embodiments, the present disclosure also provides an electronic device.

[0133] FIG5 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.

[0134] As shown in Figure 5, the electronic device 500 may include: a processor 502, and a memory 503 communicatively connected to the processor 502; the memory 503 stores computer-executable instructions; the processor 502 executes the computer-executable instructions stored in the memory 503 to implement the method provided in the aforementioned embodiment.

[0135] Furthermore, the electronic device 500 further includes:

[0136] The transceiver 501 is used for communication between the memory 503 and the processor 502 .

[0137] The memory 503 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0138] If the memory 503, processor 502, and transceiver 501 are implemented independently, the transceiver 501, memory 503, and processor 502 can be interconnected via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be divided into address buses, data buses, control buses, etc. For ease of illustration, FIG5 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0139] In some embodiments, in a specific implementation, if the memory 503, the processor 502 and the transceiver 501 are integrated on a chip, the memory 503, the processor 502 and the transceiver 501 can communicate with each other through an internal interface.

[0140] The processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present disclosure.

[0141] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0142] In order to implement the above embodiments, the present disclosure further provides a computer program product, including a computer program, which implements the methods provided in the above embodiments when executed by a processor.

[0143] In order to implement the above embodiments, the present disclosure further provides a computer program, which includes computer program code. When the computer program code is run on a computer, the computer executes the method provided by the above embodiments.

[0144] In the descriptions of the aforementioned embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0145] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0146] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0147] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered to represent a sequenced listing of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection having one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, which means that the program can be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in other suitable ways as necessary, and then storing it in a computer memory.

[0148] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0149] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0150] In addition, the functional units in the various embodiments of the present disclosure may be integrated into a single processing module, each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0151] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limiting the present disclosure. A person of ordinary skill in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery, comprising the following steps: Obtain the state of charge (SOC) of the battery corresponding to the thermal runaway of the lithium-ion battery; Determine the mass loss value before and after the thermal runaway of the lithium-ion battery; Determine the duration of the thermal runaway of the lithium-ion battery; Based on the SOC and the mass loss value, determine the first mass of carbon monoxide released after the thermal runaway of the lithium-ion battery; Based on the SOC and the duration of the thermal runaway, determine the second mass of carbon monoxide released after the thermal runaway of the lithium-ion battery; Perform a weighted sum of the first mass and the second mass to obtain the total mass of carbon monoxide released after the thermal runaway of the lithium-ion battery; The determination of the mass loss value before and after the thermal runaway of the lithium-ion battery includes: Obtain the average mass of the electrolyte in the lithium-ion battery, the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery, and the average temperature at the end of the thermal runaway of the lithium-ion battery; Based on the average mass, the actual ambient pressure, the average temperature, and the SOC, determine the mass loss value before and after the thermal runaway of the lithium-ion battery; The mass loss value before and after thermal runaway of the lithium-ion battery is obtained according to the following formula: Among them, m loss represents the mass loss value; m sol represents the average mass of the electrolyte in the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; x represents the SOC; Tc represents the average temperature at the end of the thermal runaway of the lithium-ion battery; The determination of the duration of the thermal runaway of the lithium-ion battery includes: Obtain the thickness of the shortest side of the battery of the lithium-ion battery, the heat power received by the battery surface, the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery, and the maximum SOC that can be reached after the thermal runaway of the lithium-ion battery; Based on the thickness, the actual ambient pressure, the heat power received by the battery surface, the maximum SOC, and the SOC, determine the duration of the thermal runaway of the lithium-ion battery.

2. The method according to claim 1, wherein the thermal runaway duration of the lithium-ion battery is obtained according to the following formula: Among them, The said T loss represents the duration of the thermal runaway; L w represents the thickness of the shortest side of the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; W is the heat power received by the battery surface; x c represents the maximum SOC.

3. The method according to any one of claims 1 to 2, wherein the first mass is obtained according to the following formula: m co1 = p + pL w + E l x 2 + E h m loss 2 + x c x m loss Among them, m co1 represents the first quality; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; L w represents the thickness of the shortest side of the battery of the lithium-ion battery; E h represents the highest voltage when the lithium-ion battery is fully charged; E l represents the minimum voltage when the lithium-ion battery is fully discharged; x c represents the maximum SOC that can be reached after the thermal runaway of the lithium-ion battery; m loss represents the mass loss value; x represents the SOC.

4. The method according to any one of claims 1 to 3, wherein the second quality is obtained according to the following formula: Among them, m co2 represents the second quality; E h represents the maximum voltage when the lithium-ion battery is fully charged; E l represents the minimum voltage when the lithium-ion battery is fully discharged; L w represents the thickness of the shortest side of the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; p0 represents the standard atmospheric pressure; x represents the SOC; T loss represents the duration of thermal runaway; m represents the average mass of the battery.

5. A device for determining the mass of carbon monoxide released during thermal runaway of a lithium-ion battery, comprising: A first acquisition module for obtaining the state of charge (SOC) of the battery corresponding to the thermal runaway of the lithium-ion battery; A mass loss value module for determining the mass loss value before and after the thermal runaway of the lithium-ion battery; A thermal runaway duration module for determining the duration of the thermal runaway of the lithium-ion battery; A first determination module for determining the first mass of carbon monoxide released after the thermal runaway of the lithium-ion battery based on the SOC and the mass loss value; A second determination module for determining the second mass of carbon monoxide released after the thermal runaway of the lithium-ion battery based on the SOC and the duration of the thermal runaway; A weighted sum module for performing a weighted sum of the first mass and the second mass to obtain the total mass of carbon monoxide released after the thermal runaway of the lithium-ion battery; The mass loss value module is specifically used for: Obtaining the average mass of the electrolyte in the lithium-ion battery, the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery, and the average temperature at the end of the thermal runaway of the lithium-ion battery; Based on the average mass, the actual ambient pressure, the average temperature, and the SOC, determining the mass loss value before and after the thermal runaway of the lithium-ion battery; The mass loss value before and after thermal runaway of the lithium-ion battery is obtained according to the following formula: where m loss represents the mass loss value; m sol represents the average mass of the electrolyte in the lithium-ion battery; p represents the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery; x represents the SOC; Tc represents the average temperature at the end of the thermal runaway of the lithium-ion battery; The thermal runaway duration module is specifically used for: Obtain the thickness of the shortest side of the lithium-ion battery, the heat power received by the battery surface, the actual ambient pressure corresponding to the thermal runaway of the lithium-ion battery, and the maximum SOC that can be reached after the thermal runaway of the lithium-ion battery; Determine the thermal runaway duration of the lithium-ion battery according to the thickness, the actual ambient pressure, the heat power received by the battery surface, the maximum SOC, and the SOC.

6. An electronic device, comprising: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1-4.

7. A computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of claims 1-4.

8. A computer program product, including a computer program, which implements the method according to any one of claims 1-4 when the computer program is executed by a processor.

9. A computer program, the computer program includes computer program code, and when the computer program code runs on a computer, it causes the computer to execute the method according to any one of claims 1-4.

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