CN112290513A - Terminal and battery safety management method and device thereof - Google Patents
Terminal and battery safety management method and device thereof Download PDFInfo
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- CN112290513A CN112290513A CN202011284013.8A CN202011284013A CN112290513A CN 112290513 A CN112290513 A CN 112290513A CN 202011284013 A CN202011284013 A CN 202011284013A CN 112290513 A CN112290513 A CN 112290513A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
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- Power Engineering (AREA)
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- General Health & Medical Sciences (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The application discloses a terminal and a battery safety management method and device thereof. The battery safety management method comprises the following steps: continuously detecting the health state of the battery in the working process of the battery; judging whether the health state of the battery reaches a safety critical state or not; and performing safe use control on the battery when the state of health of the battery reaches the safety critical state. Therefore, the damage to the terminal and the user is avoided, and the use safety of the battery is improved.
Description
Technical Field
The present application relates to the field of batteries, and in particular, to a terminal and a battery safety management method and apparatus thereof.
Background
The existing lithium ion battery has high voltage, high energy, high power and long service life, and is widely applied to the fields of electric vehicles, consumer electronics and the like, but the lithium ion battery has the biggest defects of poor safety performance and easy thermal runaway, so the safety performance of the lithium ion battery cannot be ignored. Generally, a protection board is added to the lithium ion battery in the mobile terminal to control the overcharge, the overdischarge, the overvoltage, the overcurrent, the temperature and the like of the lithium ion battery to improve the use safety performance of the battery, so that the use safety of the mobile terminal can be ensured.
In order to ensure the use safety of users, a plurality of lithium ion batteries can use battery technology which is not affected by mechanical damage such as shearing, puncturing, impacting and other physical damages, and the safety performance of the batteries is improved by changing internal chemical systems and structures such as diaphragms, current collectors and the like in the lithium ion batteries. In addition, the solid electrolyte of the all-solid-state lithium battery developed in the present year replaces the liquid electrolyte in the traditional lithium ion battery, so that the battery can be ensured to keep the original internal structure of the battery after physical damage, the problem of short circuit of the positive electrode and the negative electrode can be avoided, and the safety performance of the battery can be ensured.
However, for the improved battery system, if there is slight battery damage in the middle of the use of the mobile terminal, although safety problems such as fire can not occur, the normal use of the battery can not be influenced, but if the battery structure is damaged, the use is not limited, the probability of safety problems can be accumulated along with the lapse of time, and meanwhile, due to the fact that the outer packaging material of the battery is damaged, chemical substances such as electrolyte inside the battery can be leaked, on one hand, a user can be in contact with the toxic chemical substances, and the phenomenon that the battery cannot work suddenly occurs after a certain degree can also be caused, so that the use experience and the safety risk of the user are influenced.
Disclosure of Invention
In view of the above, the present application provides a terminal and a battery safety management method and device thereof, which avoid damage to the terminal itself and the user itself, and improve the battery use safety, so as to solve the above technical problems.
The battery safety management method provided by the embodiment of the application is applied to a terminal, and comprises the following steps:
continuously detecting the health state of the battery in the working process of the battery;
judging whether the health state of the battery reaches a safety critical state or not; and
and when the state of health of the battery reaches the safety critical state, performing safe use control on the battery.
The terminal provided by the embodiment of the application comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the computer program to execute the following steps:
continuously detecting the health state of the battery in the working process of the battery;
judging whether the health state of the battery reaches a safety critical state or not; and
and when the state of health of the battery reaches the safety critical state, performing safe use control on the battery.
The embodiment of the application provides a battery safety management device, includes:
the detection module is used for continuously detecting the health state of the battery in the working process of the battery;
the judging module is used for judging whether the health state of the battery reaches a safety critical state or not based on the detected health state of the battery; and
and the control module is used for performing safe use control on the battery when the health state of the battery reaches a safety critical state.
According to the computer-readable storage medium provided by the embodiment of the application, a computer program is stored in the computer-readable storage medium, and the computer program is called by a processor to run, and then the steps in the battery safety management method are executed.
Therefore, in the application, when the health state of the battery reaches the safety critical state, the battery is subjected to safe use control, the damage to the terminal and the user is avoided, and the use safety of the battery is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a battery safety management method according to an embodiment of the present application.
Fig. 2 is a block diagram of a terminal according to an embodiment of the present application.
Fig. 3 is a table showing a correspondence relationship between a time and a discharge voltage of a terminal according to an embodiment of the present application.
Fig. 4 is a block diagram of a battery safety management device according to an embodiment of the present application.
Fig. 5 is a block diagram of a terminal in another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application are clearly and completely described below with reference to the drawings of the embodiments of the present application. It is to be understood that the described embodiments are merely exemplary of some, and not all, of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a," "an," or "the" and similar referents in the context of this application are not to be construed as limiting in number, but rather as indicating the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item preceding the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled," and the like, are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The terminal according to the embodiments of the present application may include various handheld devices with a battery, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of User Equipment (UE), Mobile Stations (MS), terminal devices (terminal device), and so on. For convenience of description, the above-mentioned devices are collectively referred to as a terminal.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a battery safety management method according to an embodiment of the present application. It should be noted that the execution sequence of the battery safety management method is not limited to the sequence shown in fig. 1, and may be adjusted according to actual conditions. Specifically, referring to fig. 1 and fig. 2 together, the battery safety management method includes:
step 101: continuously detecting the health state of the battery 100 during the operation of the battery 100;
step 102: judging whether the health state of the battery 100 reaches a safety critical state; if yes, entering step 103, otherwise, repeating step 101;
step 103: safe use control is applied to the battery 100.
Therefore, in the present application, when the health state of the battery 100 reaches the safety critical state, the battery 100 is controlled to be safely used, so that the terminal and the user are prevented from being injured, and the use safety of the battery 100 is improved.
Further, in one embodiment, the continuously detecting the state of health of the battery 100 includes at least one of:
continuously detecting the physical form condition of the battery 100;
the charge-discharge characteristics of battery 100 during operation are continuously detected.
The physical form conditions of the battery 100 include two conditions of complete appearance and damaged appearance, and when the appearance of the battery 100 is complete and not damaged, the battery 100 does not leak liquid or gas. When the outer shape of the battery 100 is damaged, the battery 100 may leak liquid and gas.
The charge and discharge characteristics of the battery 100 during operation include charge characteristics and discharge characteristics. After the battery 100 is partially destroyed, the charge characteristic and the discharge characteristic of the battery 100 during operation will change.
Therefore, the safety lithium ion battery 100 continuously detects the internal and external physical state of the battery 100 and the charging and discharging characteristics during operation to judge the health state of the battery 100 by judging the battery 100 in the use process of the safety lithium ion battery 100, and performs safety use control on the battery 100 when the health state reaches a safety critical state, so that the safety problem caused by continuous use after the battery 100 is damaged is avoided, and the use safety of a user is ensured.
Further, in one embodiment, the battery 100 includes a gas sensor 30 disposed outside the battery 100, and the method for continuously detecting the physical state of the battery 100 includes:
detecting the physical form condition of the battery 100 by sensing the gas concentration of one or more gases preset in the environment where the battery is located by the gas sensor 30;
determining whether the state of health of the battery 100 reaches a safety critical state includes:
when the gas concentration of one or more gases preset in the environment where the battery 100 is located, which is sensed by the gas sensor 30, is greater than a preset concentration threshold, it is determined that the battery 100 is damaged.
Further, in an embodiment, the battery 100 includes a battery core and a battery protection board, and the gas sensor 30 may be disposed on a surface of the battery core and/or a surface of the battery protection board. The gas includes but is not limited to CO2、CO、HF、PF3、EC、DMC、EMC、H2And some hydrocarbons, such as CH4、C2H60、CH2OH、CH30CH3One or more of (a). Since these gases are generated only when the outer surface of the battery 100 is damaged, it is possible to determine whether the battery 100 is damaged by detecting the concentration of these gases.
Further, in one embodiment, the battery 100 includes a surface tension sensor 40 disposed outside the battery 100, and the continuously detecting the physical state condition of the battery 100 includes:
detecting a physical form condition of the battery 100 by sensing the surface tension of the battery 100 through the surface tension sensor 40;
determining whether the state of health of the battery 100 reaches a safety critical state includes:
when the variation value of the surface tension of the battery 100 relative to the last detection period is greater than the tension variation threshold value, it is determined that the breakage of the battery 100 occurs.
Further, in one embodiment, the surface tension sensor 40 is disposed on a cell surface aluminum-plastic film of the battery 100, and when the cell surface of the battery 100 is damaged, a jump of a cell surface tension value of the battery 100 with respect to a tension value measured in a previous detection cycle may occur, for example, when the jump of the cell surface tension value of the battery 100 is greater than 1N/s, it may be determined that the surface of the battery 100 is damaged.
Further, in one embodiment, the continuously detecting the charge-discharge characteristics of the battery 100 during operation includes at least one of the following:
continuously detecting the discharge voltage value of battery 100;
continuously detecting the actual discharge capacity of the battery 100 in a preset time period;
the maximum capacity value of battery 100 in the current state is continuously detected.
Further, in one embodiment, when continuously detecting the charge-discharge characteristics of the battery 100 during operation includes continuously detecting the discharge voltage value of the battery 100, determining whether the state of health of the battery 100 reaches a safety critical state includes:
comparing the current discharge voltage value of the battery 100 with the discharge voltage value obtained in the last detection period;
judging whether the difference between the current discharge voltage value of the battery 100 and the discharge voltage value obtained in the last detection period is greater than a preset threshold value;
and when the current discharge voltage value of the battery 100 is 0 or the difference between the current discharge voltage value of the battery 100 and the discharge voltage value obtained in the last detection period is greater than a first difference threshold, determining that the battery 100 is damaged.
Accordingly, when the battery 100 is broken, the discharge voltage value thereof occasionally becomes 0, and the number of times of occurrence is small at the beginning of the breakage of the battery 100, but the number of times of occurrence is gradually increased as the breakage time of the battery 100 is increased. Also, when the battery 100 is broken, a discharge voltage value of the battery 100 may jump, for example, as shown in fig. 3, where an abscissa represents time, an ordinate represents a discharge voltage V, and a voltage variation value is greater than 1V/s, it is determined that the battery 100 is broken.
Further, in one embodiment, the continuously detecting the charge-discharge characteristics of the battery 100 during the operation includes continuously detecting an actual discharge capacity of the battery 100 within a preset time period, and the determining whether the state of health of the battery 100 reaches a safety critical state includes:
detecting the actual discharge capacity of the battery 100 in a preset time period;
comparing the actual discharge capacity of the battery 100 with the theoretical calculated discharge capacity within the preset time period;
and when the difference value between the actual discharge capacity and the theoretical calculation discharge capacity of the battery 100 is larger than a second difference threshold value, determining that the battery 100 is broken.
Further, in one embodiment, the actual discharge capacity Δ Q0 ═ idt of battery 100 over a certain period of time, where i is the current and t is the time; and the theoretically calculated discharge capacity value is Δ Q0 ═ (DoD1-DoD0) × Qmax, where DoD0 and DoD1 are the discharge depths corresponding to the discharge starting point and the discharge ending point respectively, and Qmax is the maximum capacity value of the battery 100.
Therefore, when the battery 100 is damaged, internal consumption of the battery 100 due to local short circuit may be caused, so that the actual discharge capacity of the battery 100 is smaller than the theoretically calculated discharge capacity of the battery 100, and therefore, whether the battery 100 is damaged or not may be determined according to a difference value between the actual discharge capacity of the battery 100 in a preset time period and the theoretically calculated discharge capacity of the battery 100 in the preset time period, and when the difference value is larger than the second preset threshold, it is determined that the battery 100 is damaged.
Further, in one embodiment, the continuously detecting the charge-discharge characteristics of the battery 100 during the operation includes continuously detecting a maximum capacity value of the battery 100 in the current state, and determining whether the state of health of the battery 100 reaches a safety critical state includes:
detecting the maximum capacity value of the battery 100 in the current state;
determining a difference value between the maximum capacity value of the battery 100 in the current state and the maximum capacity value of the battery in the last time;
when the difference is greater than the third difference threshold, it is determined that the breakage of the battery 100 occurs.
Further, in one embodiment, the maximum capacity value of the battery 100 in the current state, i.e., Δ Q0' (DoD1-DoD0) × Qmax, is obtained by integrating the total discharge amount from DoD-0 to DoD-100 in a certain full discharge process by current.
Accordingly, when the breakage of the battery 100 occurs, a part of the electric storage units of the battery 100 is broken, so that the maximum capacity value of the battery 100 becomes small, and therefore, it is possible to determine that the breakage of the battery 100 occurs if the difference between the current maximum capacity value of the battery 100 and the maximum capacity value of the last detection cycle is greater than the third difference threshold value, based on the comparison between the current maximum capacity value of the battery 100 and the maximum capacity value of the last detection cycle.
Further, in one embodiment, the battery 100 is subjected to safe-use control, which includes at least one of:
prompting a user to replace the battery after sale on a display screen;
limiting the charging and discharging voltage range of the battery 100, for example, the normal operating voltage of the battery 100 is 3-4.4V originally, and the charging and discharging voltage of the battery 100 is 3.5-4.2V;
the battery 100 is restricted from operating, i.e., the path of the battery 100 is cut off, so that the terminal cannot be powered on, which is regarded as failure handling.
In summary, with respect to the state of health of the battery 100, it is possible to determine specifically from the aspect of the physical form condition and from the aspect of the charge-discharge characteristic of the battery 100 at the time of operation, and specifically, the aspect of the physical form condition includes two determination conditions, i.e., the gas concentration determination and the surface tension determination, and the aspect of the charge-discharge characteristic of the battery 100 at the time of operation includes three determination conditions, i.e., the current discharge voltage, the actual discharge capacity, and the maximum capacity. That is, the state of health of the battery 100 can be judged from the above five conditions.
It is understood that, in one embodiment, in order to prevent misjudgment caused by single condition judgment, regarding the health condition of the battery 100, it is determined that the battery 100 is broken when at least two judgment conditions of the above five conditions are satisfied.
It is understood that, when, in another embodiment, in order to prevent erroneous determination caused by single condition determination, therefore, regarding the state of health of the battery 100, it is determined that breakage of the battery 100 occurs when at least one determination condition in terms of physical form condition and at least one determination condition in terms of charge-discharge characteristic condition of the battery 100 are satisfied.
Referring to fig. 2, fig. 2 is a block diagram of a terminal according to an embodiment of the present application. The terminal 100 comprises a processor 10, a memory 20 and a computer program stored in the memory 20 and executable on the processor 10. It should be noted that the Processor 10 may be, but is not limited to, a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and the like. The memory 20 is used to store various files, information and/or data. The memory 20 may include high speed random access memory and may also include non-volatile memory such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), a plurality of magnetic disk storage devices, a Flash memory device, or other volatile solid state storage device. The terminal 100 also includes a display screen 30. The display screen 30 is any electronic display screen with a display function. The display screen 30 is electrically connected to the processor 10. The processor 10 executes the computer program to perform the steps of:
continuously detecting the health state of the battery 100 during the operation of the battery 100;
judging whether the health state of the battery 100 reaches a safety critical state; and
when the state of health of the battery 100 reaches the safety critical state, safe use control is performed on the battery 100.
Therefore, in the present application, when the health state of the battery 100 reaches the safety critical state, the battery 100 is controlled to be safely used, so that the terminal and the user are prevented from being injured, and the use safety of the battery 100 is improved.
Further, in one embodiment, the processor 10 executes the computer program to perform steps for continuously detecting the state of health of the battery 100, including at least one of:
continuously detecting the physical form condition of the battery 100;
the charge-discharge characteristics of battery 100 during operation are continuously detected.
The physical form conditions of the battery 100 include two conditions of complete appearance and damaged appearance, and when the appearance of the battery 100 is complete and not damaged, the battery 100 does not leak liquid or gas. When the outer shape of the battery 100 is damaged, the battery 100 may leak liquid and gas.
The charge and discharge characteristics of the battery 100 during operation include charge characteristics and discharge characteristics. After the battery 100 is partially destroyed, the charge characteristic and the discharge characteristic of the battery 100 during operation will change.
Therefore, the safety lithium ion battery 100 continuously detects the internal and external physical state of the battery 100 and the charging and discharging characteristics during operation to judge the health state of the battery 100 by judging the battery 100 in the use process of the safety lithium ion battery 100, and performs safety use control on the battery 100 when the health state reaches a safety critical state, so that the safety problem caused by continuous use after the battery 100 is damaged is avoided, and the use safety of a user is ensured.
Further, in one embodiment, the battery 100 includes the gas sensor 30 disposed outside the battery, and the processor 10 executes the computer program to perform steps of continuously detecting the physical state condition of the battery 100, including:
detecting the physical form condition of the battery 100 by sensing the gas concentration of one or more gases preset in the environment where the battery 100 is located by the gas sensor 30;
determining whether the state of health of the battery 100 reaches a safety critical state includes:
when the gas concentration of one or more gases preset in the environment where the battery 100 is located, which is sensed by the gas sensor 30, is greater than a preset concentration threshold, it is determined that the battery 100 is damaged.
Further, in an embodiment, the battery 100 includes a battery core and a battery protection board, and the gas sensor 30 may be disposed on a surface of the battery core and/or a surface of the battery protection board. The gas includes but is not limited to CO2、CO、HF、PF3、EC、DMC、EMC、H2And some hydrocarbons, such as CH4、C2H60、CH2OH、CH30CH3One or more of (a). Since these gases are generated only when the outer surface of the battery 100 is damaged, it is possible to determine whether the battery 100 is damaged by detecting the concentration of these gases.
Further, in one embodiment, the battery 100 includes the surface tension sensor 40 disposed outside the battery, and the processor 10 executes the computer program to perform steps of continuously detecting the physical form condition of the battery 100, including:
detecting a physical form condition of the battery 100 by sensing the surface tension of the battery 100 through the surface tension sensor 40;
determining whether the state of health of the battery 100 reaches a safety critical state includes:
when the variation value of the surface tension of the battery 100 relative to the last detection period is greater than the tension variation threshold value, it is determined that the breakage of the battery 100 occurs.
Further, in one embodiment, the surface tension sensor 40 is disposed on a cell surface aluminum-plastic film of the battery 100, and when the cell surface of the battery 100 is damaged, a jump of a cell surface tension value of the battery 100 with respect to a tension value measured in a previous detection cycle may occur, for example, when the jump of the cell surface tension value of the battery 100 is greater than 1N/s, it may be determined that the surface of the battery 100 is damaged.
Further, in one embodiment, the processor 10 executes the computer program to perform steps of continuously detecting the charge and discharge characteristics of the battery 100 during operation, including at least one of:
continuously detecting the discharge voltage value of battery 100;
continuously detecting the actual discharge capacity of the battery 100 in a preset time period;
the maximum capacity value of battery 100 in the current state is continuously detected.
Further, in one embodiment, when the continuously detecting the charge-discharge characteristic of the battery 100 includes continuously detecting the discharge voltage value of the battery 100, the processor 10 executes the computer program to execute the steps of determining whether the state of health of the battery 100 reaches the safety critical state, including:
comparing the current discharge voltage value of the battery 100 with the discharge voltage value obtained in the last detection period;
judging whether the difference between the current discharge voltage value of the battery 100 and the discharge voltage value obtained in the last detection period is greater than a preset threshold value;
and when the current discharge voltage value of the battery 100 is 0 or the difference between the current discharge voltage value of the battery 100 and the discharge voltage value obtained in the last detection period is greater than a first difference threshold, determining that the battery 100 is damaged.
Accordingly, when the battery 100 is broken, the discharge voltage value thereof occasionally becomes 0, and the number of times of occurrence is small at the beginning of the breakage of the battery 100, but the number of times of occurrence is gradually increased as the breakage time of the battery 100 is increased. When the battery 100 is broken, a discharge voltage value of the battery 100 may jump, and it is determined that the battery 100 is broken.
Further, in one embodiment, when continuously detecting the charge-discharge characteristics of the battery 100 during operation includes continuously detecting the actual discharge capacity of the battery 100 within a preset time period, the processor 10 executes the computer program to perform the steps of determining whether the state of health of the battery 100 reaches a safety critical state, including:
detecting the actual discharge capacity of the battery 100 in a preset time period;
comparing the actual discharge capacity of the battery 100 with the theoretical calculated discharge capacity within the preset time period;
and when the difference value between the actual discharge capacity and the theoretical calculation discharge capacity of the battery 100 is larger than a second difference threshold value, determining that the battery 100 is broken.
Further, in one embodiment, the actual discharge capacity Δ Q0 ═ idt of battery 100 over a certain period of time, where i is the current and t is the time; and the theoretically calculated discharge capacity value is Δ Q0 ═ (DoD1-DoD0) × Qmax, where DoD0 and DoD1 are the discharge depths corresponding to the discharge starting point and the discharge ending point respectively, and Qmax is the maximum capacity value of the battery 100.
Therefore, when the battery 100 is damaged, internal consumption of the battery 100 due to local short circuit may be caused, so that the actual discharge capacity of the battery 100 is smaller than the theoretically calculated discharge capacity of the battery 100, and therefore, whether the battery 100 is damaged or not may be determined according to a difference value between the actual discharge capacity of the battery 100 in a preset time period and the theoretically calculated discharge capacity of the battery 100 in the preset time period, and when the difference value is larger than the second preset threshold, it is determined that the battery 100 is damaged.
Further, in one embodiment, when the continuously detecting the charge-discharge characteristics of the battery 100 includes continuously detecting the maximum capacity value of the battery 100 in the current state, the processor 10 executes the computer program to execute the steps of determining whether the state of health of the battery 100 reaches the safety critical state, including:
detecting the maximum capacity value of the battery 100 in the current state;
determining a difference value between the maximum capacity value of the battery 100 in the current state and the maximum capacity value of the battery in the last time;
when the difference is greater than the third difference threshold, it is determined that the breakage of the battery 100 occurs.
Further, in one embodiment, the maximum capacity value of the battery 100 in the current state, i.e., Δ Q0' (DoD1-DoD0) × Qmax, is obtained by integrating the total discharge amount from DoD-0 to DoD-100 in a certain full discharge process by current.
Accordingly, when the breakage of the battery 100 occurs, a part of the electric storage units of the battery 100 is broken, so that the maximum capacity value of the battery 100 becomes small, and therefore, it is possible to determine that the breakage of the battery 100 occurs if the difference between the current maximum capacity value of the battery 100 and the maximum capacity value of the last detection cycle is greater than the third difference threshold value, based on the comparison between the current maximum capacity value of the battery 100 and the maximum capacity value of the last detection cycle.
Further, in one embodiment, the processor 10 executes the computer program to perform steps for performing safe use control on the battery 100, including at least one of:
prompting the user on the display screen to replace the battery 100 after sale;
limiting the charging and discharging voltage range of the battery 100, for example, the normal operating voltage of the battery 100 is 3-4.4V originally, and the charging and discharging voltage of the battery 100 is 3.5-4.2V;
the battery 100 is restricted from operating, i.e., the path of the battery 100 is cut off, so that the terminal cannot be powered on, which is regarded as failure handling.
In summary, with respect to the state of health of the battery 100, it is possible to determine specifically from the aspect of the physical form condition and from the aspect of the charge-discharge characteristic of the battery 100 at the time of operation, and specifically, the aspect of the physical form condition includes two determination conditions, i.e., the gas concentration determination and the surface tension determination, and the aspect of the charge-discharge characteristic of the battery 100 at the time of operation includes three determination conditions, i.e., the current discharge voltage, the actual discharge capacity, and the maximum capacity. That is, the state of health of the battery 100 can be judged from the above five conditions.
It is understood that, in one embodiment, in order to prevent misjudgment caused by single condition judgment, regarding the health condition of the battery 100, it is determined that the battery 100 is broken when at least two judgment conditions of the above five conditions are satisfied.
It is understood that, when, in another embodiment, in order to prevent erroneous determination caused by single condition determination, therefore, regarding the state of health of the battery 100, it is determined that breakage of the battery 100 occurs when at least one determination condition in terms of physical form condition and at least one determination condition in terms of charge-discharge characteristic condition of the battery 100 are satisfied.
Fig. 4 is a block diagram of a battery safety management device according to an embodiment of the present application. The battery safety management apparatus 400 includes a detection module 410, a determination module 420, and a control module 430. The detection module 410 is configured to continuously detect the state of health of the battery 100 during the operation of the battery 100. The determining module 420 is configured to determine whether the state of health of the battery 100 reaches a safety critical state based on the detected state of health of the battery 100. The control module 430 is configured to perform safe use control on the battery 100 when the state of health of the battery 100 reaches a safety critical state.
Fig. 5 is a block diagram illustrating a partial structure of a mobile phone related to a terminal provided in an embodiment of the present application. Referring to fig. 5, the handset includes: radio Frequency (RF) circuit 610, memory 620, input/output unit 630, sensor 650, audio circuit 660, Wireless Fidelity (WiFi) module 670, processor 680, and power supply 690. Those skilled in the art will appreciate that the handset configuration shown in fig. 5 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile phone in detail with reference to fig. 5:
the input/output unit 630 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. In particular, the input/output unit 630 may include a touch display screen 633 and other input devices 632. Other input devices 632 may include, but are not limited to, one or more of physical keys, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
Wherein, the processor 680 is configured to perform the following steps:
continuously detecting the health state of the battery 100 during the operation of the battery 100;
judging whether the health state of the battery 100 reaches a safety critical state; and
when the state of health of the battery 100 reaches the safety critical state, safe use control is performed on the battery 100.
The processor 680 is a control center of the mobile phone, and connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 620 and calling data stored in the memory 620, thereby performing overall monitoring of the mobile phone. Optionally, the processor 680 may include one or more processing units, which may be artificial intelligence chips, quantum chips; preferably, the processor 680 may integrate an application processor, which mainly handles operating systems, display interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 680.
Further, the memory 620 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The RF circuitry 610 may be used for the reception and transmission of information. In general, RF circuit 610 includes, but is not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 610 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.
The handset may also include at least one sensor 650, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the touch display screen according to the brightness of ambient light, and the proximity sensor may turn off the touch display screen and/or the backlight when the mobile phone moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
WiFi belongs to short-distance wireless transmission technology, and the mobile phone can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 670, and provides wireless broadband Internet access for the user. Although fig. 5 shows the WiFi module 670, it is understood that it does not belong to the essential constitution of the handset, and can be omitted entirely as needed within the scope not changing the essence of the invention.
The handset also includes a power supply 690 (e.g., a battery) for powering the various components, which may preferably be logically connected to the processor 680 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption.
Although not shown, the mobile phone may further include a camera, a bluetooth module, etc., which are not described herein.
In the foregoing embodiment shown in fig. 1, the method flow of each step may be implemented based on the structure of the mobile phone.
In the embodiment shown in fig. 4, the functions of the units can be implemented based on the structure of the mobile phone.
Embodiments of the present application also provide a computer storage medium, where the computer storage medium is used to store a computer program, and the computer program enables a computer to execute some or all of the steps of any one of the battery safety management methods as described in the above method embodiments.
Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any one of the battery safety management methods as recited in the above method embodiments.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module.
The integrated units, if implemented in the form of software program modules and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (12)
1. A battery safety management method is applied to a terminal, and is characterized by comprising the following steps:
continuously detecting the health state of the battery in the working process of the battery;
judging whether the health state of the battery reaches a safety critical state or not; and
and when the state of health of the battery reaches the safety critical state, performing safe use control on the battery.
2. The battery safety management method according to claim 1, wherein continuously detecting the state of health of the battery comprises at least one of:
continuously detecting the physical form condition of the battery;
the charge and discharge characteristics of the battery during operation are continuously detected.
3. The battery safety management method according to claim 2, wherein the battery includes a gas sensor provided outside the battery, and the continuously detecting a physical form condition of the battery includes:
detecting the physical form condition of the battery by sensing the gas concentration of one or more gases preset in the environment where the battery is located through the gas sensor;
judging whether the health state of the battery reaches a safety critical state or not, comprising the following steps:
and when the gas concentration of one or more gases preset in the environment where the battery is located, which is sensed by the gas sensor, is greater than a preset concentration threshold value, determining that the battery is damaged.
4. The battery safety management method according to claim 2, wherein the battery includes a surface tension sensor disposed at an exterior thereof, and the continuously detecting of the physical form condition of the battery includes:
sensing a surface tension of the battery by the surface tension sensor to detect a physical form condition of the battery;
judging whether the health state of the battery reaches a safety critical state or not, comprising the following steps:
and when the change value of the surface tension of the battery relative to the last detection period is larger than a tension change threshold value, determining that the battery is broken.
5. The battery safety management method according to claim 2, wherein the continuously detecting of the charge and discharge characteristics of the battery during operation includes at least one of:
continuously detecting the discharge voltage value of the battery;
continuously detecting the actual discharge capacity of the battery in a preset time period;
and continuously detecting the maximum capacity value of the battery in the current state.
6. The battery safety management method according to claim 5, wherein when continuously detecting the charge-discharge characteristics of the battery during operation includes continuously detecting a discharge voltage value of the battery, determining whether the state of health of the battery reaches a safety critical state includes:
comparing the current discharge voltage value of the battery with the discharge voltage value obtained in the last detection period;
judging whether the difference value between the current discharge voltage value of the battery and the discharge voltage value obtained in the last detection period is greater than a preset threshold value or not;
and when the current discharge voltage value of the battery is 0 or the difference value between the current discharge voltage value of the battery and the discharge voltage value obtained in the last detection period is larger than a preset threshold value, determining that the battery is damaged.
7. The battery safety management method according to claim 5, wherein when continuously detecting the charge-discharge characteristics of the battery during operation comprises continuously detecting the actual discharge capacity of the battery within a preset time period, and determining whether the state of health of the battery reaches a safety critical state comprises:
detecting the actual discharge capacity of the battery in a preset time period;
comparing the actual discharge capacity of the battery with the theoretical calculation discharge capacity in the preset time period;
and when the difference value between the actual discharge capacity and the theoretical calculation discharge capacity of the battery is larger than a preset threshold value, determining that the battery is damaged.
8. The method for managing battery safety according to claim 5, wherein the step of determining whether the state of health of the battery reaches a safety critical state when continuously detecting the charging and discharging characteristics of the battery during operation comprises continuously detecting a maximum capacity value of the battery in a current state, comprises:
detecting the maximum capacity value of the battery in the current state;
determining the difference between the maximum capacity value of the battery in the current state and the maximum capacity value of the battery in the last time;
and when the difference value is larger than a preset threshold value, determining that the battery is damaged.
9. The battery safety management method according to claim 1, wherein performing safe-use control on the battery includes at least one of:
prompting a user to replace the battery after sale on a display screen;
limiting the charging and discharging voltage range of the battery;
the battery is restricted from operating.
10. A terminal comprising a processor, a memory, and a plurality of computer programs stored in the memory and operable on the processor, the processor executing the plurality of computer programs to perform the battery safety management method according to any one of claims 1 to 9.
11. A battery safety management device, comprising:
the detection module is used for continuously detecting the health state of the battery in the working process of the battery;
the judging module is used for judging whether the health state of the battery reaches a safety critical state or not based on the detected health state of the battery; and
and the control module is used for performing safe use control on the battery when the health state of the battery reaches a safety critical state.
12. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and the computer program is called by a processor to execute the steps of the battery safety management method according to any one of claims 1 to 9.
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| CN202011284013.8A CN112290513A (en) | 2020-11-16 | 2020-11-16 | Terminal and battery safety management method and device thereof |
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| CN202011284013.8A CN112290513A (en) | 2020-11-16 | 2020-11-16 | Terminal and battery safety management method and device thereof |
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