CN113287220A

CN113287220A - Battery protection method, system, movable platform, battery and storage medium

Info

Publication number: CN113287220A
Application number: CN202080005230.0A
Authority: CN
Inventors: 许柏皋; 林宋荣; 李鹏
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2021-08-20
Also published as: WO2021142598A1

Abstract

A battery protection method, a system, a movable platform, a battery and a storage medium are provided, the method comprises the following steps: acquiring a current battery temperature (S101); determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform (S102); the battery is controlled to execute a battery protection strategy corresponding to the current battery temperature to control the operation of the movable platform (S103).

Description

Battery protection method, system, movable platform, battery and storage medium

Technical Field

The present disclosure relates to the field of battery technologies, and in particular, to a battery protection method, a battery protection system, a movable platform, a battery, and a storage medium.

Background

Many mobile platforms (e.g., unmanned aerial vehicles) are battery powered to be capable of operation. The temperature rise of the battery of the unmanned aerial vehicle is very fast because of large discharge current. The phenomenon that the temperature of the battery exceeds 80 ℃ often occurs, and the damage to the battery caused by over-temperature use is very large. In the conventional art, there is no control for over-temperature use of the battery. The battery is used in the overtemperature, so that the use safety of the battery cannot be guaranteed on one hand, and the operation safety of the movable platform cannot be guaranteed on the other hand, which are easy to cause safety accidents.

Disclosure of Invention

Based on this, the application provides a battery protection method, a system, a movable platform, a battery and a storage medium.

In a first aspect, the present application provides a battery protection method, where the battery is used to supply power to a movable platform, and the method includes:

acquiring the current battery temperature;

determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform;

and controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.

In a second aspect, the present application provides a battery protection method, the method comprising:

acquiring the current battery temperature;

determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery;

controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery.

In a third aspect, the present application provides a battery protection system, the system comprising: a memory and a processor;

the memory is used for storing a computer program;

the processor is configured to execute the computer program and, when executing the computer program, implement the steps of:

acquiring the current battery temperature;

In a fourth aspect, the present application provides a battery protection system, the system comprising: a memory and a processor;

the memory is used for storing a computer program;

acquiring the current battery temperature;

In a fifth aspect, the present application provides a movable platform comprising a battery protection system as described in the third aspect.

In a sixth aspect, the present application provides a battery comprising the battery protection system of the third aspect.

In a seventh aspect, the present application provides a battery comprising the battery protection system of the fourth aspect.

In an eighth aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement the battery protection method according to the first aspect.

In a ninth aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement the battery protection method according to the second aspect.

The embodiment of the application provides a battery protection method, a battery protection system, a movable platform, a battery and a storage medium, and the current battery temperature is obtained; determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery or control the operation of the movable platform; and controlling the battery to execute a battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery or control the operation of the movable platform. Due to the fact that the preset multistage battery protection strategies corresponding to the temperature ranges of the battery in multiple levels are preset, the battery is controlled to execute the battery protection strategy corresponding to the current battery temperature, safe use of the battery is achieved or operation of the movable platform is controlled, on one hand, safe use of the battery can be achieved when the movable platform operates, the service life of the battery can be prolonged, the possibility that the battery is ignited due to over-temperature use can be prevented, battery safety accidents can be avoided, on the other hand, the safe use of the battery is combined with the operation of the movable platform, support can be provided for guaranteeing safe operation of the movable platform as far as possible when the safe use of the battery is guaranteed, and support is provided for avoiding the safe use of the movable platform as far as possible.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1a is a schematic block diagram of a charging system provided in an embodiment of the present application;

FIG. 1b is a schematic block diagram of a movable platform provided in another embodiment of the present application;

FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a battery protection method of the present application;

FIG. 3 is a schematic view of an application scenario of the battery protection method of the present application;

FIG. 4 is a schematic flow chart diagram illustrating another embodiment of a battery protection method of the present application;

FIG. 5 is a schematic flow chart diagram illustrating a battery protection method according to another embodiment of the present application;

FIG. 6 is a graph of a charging voltage curve when a short circuit occurs in a battery according to the battery protection method of the present application;

FIG. 7 is a graph of a charging voltage when a short circuit does not occur in a battery according to the battery protection method of the present application;

FIG. 8 is a schematic diagram of another application scenario of the battery protection method of the present application;

FIG. 9 is a schematic diagram of another application scenario of the battery protection method of the present application;

fig. 10 is a schematic structural diagram of an embodiment of the battery protection system of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments 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.

The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

Many existing movable platforms (such as unmanned aerial vehicles) run by means of battery power supply, and the battery is frequently used in an over-temperature mode, and the battery used in the over-temperature mode is not controlled. The battery is used at the excess temperature, so that the use safety of the battery cannot be guaranteed on one hand, and the operation safety of the movable platform cannot be guaranteed on the other hand, which are easy to cause safety accidents. The reason for using the battery at an excessive temperature may be various, for example, the internal short circuit of the battery, the poor heat dissipation of the battery, and the like.

In an embodiment of the present application, the current battery temperature may be obtained; and executing a protection strategy according to the current battery temperature. For example, the protection policy includes a preset multi-level battery protection policy. And determining a battery protection strategy corresponding to the current battery temperature according to the battery temperature, and controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery or control the operation of the movable platform. The preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery or control the operation of the movable platform. Due to the fact that the preset multistage battery protection strategies corresponding to the temperature ranges of the battery in multiple levels are preset, the battery is controlled to execute the battery protection strategy corresponding to the current battery temperature, safe use of the battery is achieved or operation of the movable platform is controlled, on one hand, safe use of the battery can be achieved when the movable platform operates, the service life of the battery can be prolonged, the possibility that the battery is ignited due to over-temperature use can be prevented, battery safety accidents can be avoided, on the other hand, the safe use of the battery is combined with the operation of the movable platform, support can be provided for guaranteeing safe operation of the movable platform as far as possible when the safe use of the battery is guaranteed, and support is provided for avoiding the safe use of the movable platform as far as possible.

In another embodiment of the present application, the battery parameter of the battery may be obtained; determining whether the battery is short-circuited according to the battery parameters; and determining a protection strategy when the battery is short-circuited. For example, the protection strategy includes a battery protection strategy corresponding to occurrence of a short circuit of the battery. And if the battery is short-circuited, controlling the battery to execute the battery protection strategy. The battery parameter may include at least one of a constant voltage charging time, a constant voltage charging capacity, a charging/discharging capacity ratio, and a battery temperature. And then realize when the short circuit appears in the battery, realize the protection to the battery, so, can avoid the overtemperature of battery to a certain extent, improved the security of battery use from this.

In yet another embodiment of the present application, a battery parameter of the battery, such as a battery temperature, may be obtained, and if the battery temperature exceeds a predetermined temperature threshold, the battery may display an alarm message. For example, the display is performed in the form of voice, vibration, light, character display, or the like, so that the user can be visually notified. Or sending the parameter information of the battery to a control module of the movable platform, for example, a flight control module of the unmanned aerial vehicle, so that the control module can perform corresponding alarm operation based on the parameter information of the battery.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, fig. 1a is a schematic block diagram of a charging system according to an embodiment of the present disclosure. The charging system 100 may include a smart battery 10 and a charger 20. The charger 20 is used to connect an external power source to charge the smart battery 10, and the smart battery 10 is used to power electronic devices, such as a movable platform and a load mounted on the movable platform.

Fig. 1b is a schematic block diagram of a movable platform according to another embodiment of the present application. The mobile platform 200 may include a smart battery 10 and a body 30. The main body 30 is used for connecting an external power source to charge the smart battery 10, and the smart battery 10 is used for supplying power to the movable platform and a load mounted on the movable platform.

The smart Battery 10 may include a Battery Management System (BMS) including a Micro Controller Unit (MCU) and a discharge resistor connected to the Battery through a discharge circuit for discharging the Battery under the control of the micro controller Unit.

The micro control unit is used for acquiring and processing battery parameters of the battery, wherein the battery parameters comprise charging current, charging voltage, charging time, discharging current, discharging time, battery temperature, constant voltage charging time, constant voltage charging capacity, charging and discharging capacity ratio and the like.

The battery management system may be used to estimate a State of Charge (SOC), i.e., a remaining battery capacity, to ensure that the SOC is maintained within a reasonable range, and to prevent damage to the battery due to overcharge or overdischarge.

In the process of charging and discharging the battery, the battery management system can also acquire the voltage, the temperature, the charging and discharging current and the like of the battery in real time, so that the phenomenon of overcharge or overdischarge of the battery is prevented.

Wherein, the movable platform comprises an aircraft, a robot, an electric vehicle or an automatic unmanned vehicle and the like.

For example, the intelligent battery 10 supplies power to a motor of the aircraft to control the motor propeller to rotate, so that the aircraft can fly; for another example, the smart battery 10 supplies power to a camera mounted on an aircraft for realizing aerial photography and the like.

Wherein, this aircraft includes unmanned aerial vehicle, and this unmanned aerial vehicle includes rotor type unmanned aerial vehicle, for example four rotor type unmanned aerial vehicle, six rotor type unmanned aerial vehicle, eight rotor type unmanned aerial vehicle, also can be fixed wing unmanned aerial vehicle, can also be the combination of rotor type and fixed wing unmanned aerial vehicle, does not do the injecing here.

The robot comprises an educational robot, a Mecanum wheel omnidirectional chassis is used, a plurality of intelligent armors are arranged on the whole body, and each intelligent armor is internally provided with a hitting detection module which can rapidly detect physical hitting. Simultaneously still include the diaxon cloud platform, can rotate in a flexible way, cooperation transmitter accuracy, stability, launch crystal bullet or infrared light beam in succession, cooperation trajectory light efficiency gives the user more real shooting experience.

Therefore, the importance of the battery to the movable platform can affect the safety of the operation of the movable platform if the battery is abnormal.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with one another without conflict

Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a battery protection method according to the present application, in which the battery is used to supply power to a movable platform, and the movable platform of the present embodiment refers to various platforms that can be automatically moved or moved under controlled conditions, for example: unmanned aerial vehicles, unmanned vehicles, ground based robots, and the like. The battery is not limited to a lithium battery, and can be all batteries with battery multi-stage protection, lithium ion batteries with intelligent management, and the like. Such as an electric car battery, an electric bicycle battery, and the like. The present embodiment achieves the goal of controlling the temperature of the battery by combining the safe use of the battery with the operation of the movable platform. It should be noted that the execution main body of the embodiment may be a battery, or may be a movable platform, and specifically may be other modules of the movable platform, which is not limited herein. For the sake of distinction, the method of this embodiment that combines the safe use of the battery with the operation of the movable platform is referred to as a first battery protection method. The method comprises the following steps: step S101, step S102, and step S103.

Step S101: and acquiring the current battery temperature.

The current battery temperature is measured by a temperature sensor, the battery is provided with the temperature sensor, and the current battery temperature is determined according to the temperature collected by the temperature sensor. For example, the current battery temperature is the temperature collected by the temperature sensor. And acquiring the temperature acquired by the temperature sensor to obtain the current battery temperature. If the execution subject of the present embodiment is a movable platform, the temperature sensor may be caused to transmit the acquired temperature to other modules of the movable platform.

The current battery temperature includes a battery surface temperature and/or a battery internal temperature. The battery surface temperature may refer to a temperature of the battery surface measured by a temperature sensor provided at the battery surface. The battery internal temperature may refer to a temperature inside the battery measured by a temperature sensor probe packaged inside the battery (the packaging is completed during the battery preparation process). The surface temperature of the battery and the internal temperature of the battery have certain difference; when the battery does not have the condition for measuring the internal temperature of the battery, the surface temperature of the battery can be used as the current battery temperature; when the battery has a condition for measuring the internal temperature of the battery, the internal temperature of the battery may be used as the current battery temperature, or the surface temperature of the battery and the internal temperature of the battery may be measured at the same time, and the surface temperature of the battery and the internal temperature of the battery may be used as the current battery temperature.

Step S102: and determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.

The preset multi-level battery protection strategy refers to a preset multi-level strategy for protecting the safety of the battery. The preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.

The preset-level battery protection strategy may include one strategy or more than two strategies; a preset level of battery protection policy may include battery related (i.e., battery-side) policies, mobile platform related (i.e., mobile platform-side) policies, and user related (i.e., user-side) policies.

In one embodiment, the preset multi-stage battery protection strategy includes at least one of the following: the method comprises the steps of controlling a battery to continuously and normally operate, reducing discharge current of the battery, sending an instruction for indicating a movable platform to prepare for return voyage before stopping operation, sending a prompt for suggesting return voyage of battery over-temperature use to a user, sending an instruction for controlling the movable platform to warn the user of return voyage, sending an instruction for suggesting return voyage as soon as battery temperature is serious to the user, recording current discharge temperature of the battery, locking the battery, determining whether the battery is short-circuited or not, and displaying alarm information.

In one application, the plurality of levels of battery temperature ranges include at least one of: the temperature sensor is used for detecting the temperature of the working fluid, and is characterized in that the temperature sensor is below a normal use temperature threshold, between the normal use temperature threshold and a limited use temperature threshold, between the limited use temperature threshold and a first life-affecting temperature threshold, and above a second life-affecting temperature threshold.

In one application, the normal use temperature threshold comprises 65 ℃. The limited use temperature threshold comprises 75 ℃. The first life-affecting temperature threshold comprises 85 ℃. The second life-affecting temperature threshold comprises 90 ℃.

In one application, the battery temperature anomaly may be due to a battery short circuit. The corresponding battery protection scheme may be determined by determining whether a short circuit occurs in the battery. The method of determining whether the battery is short-circuited may be:

whether the battery is short-circuited can be determined by judging whether the battery parameter is abnormal. For example, whether the battery parameter is abnormal is determined by comparing with a standard parameter, wherein the standard parameter is a parameter when the battery is normal.

For example, whether the battery is short-circuited is determined according to battery parameters, specifically: acquiring standard parameters of a battery; and determining whether the battery is short-circuited according to the difference between the battery parameter and the standard parameter.

For example, determining whether the difference between the battery parameter and the standard parameter is within a preset range; if the difference between the battery parameter and the standard parameter is within a preset range, determining that the battery is not short-circuited; and if the difference between the battery parameter and the standard parameter is not in the preset range, determining that the battery is short-circuited. Whether the short circuit of the battery occurs can be accurately determined through the preset range.

The preset range is set according to the type of the battery, the preset ranges of different types of batteries are different, and the different types of batteries comprise different battery capacity or different battery core materials, such as lithium ion batteries and lead storage batteries.

For another example, determining whether the battery parameter is greater than a standard parameter; if the battery parameter is larger than the standard parameter, determining that the battery is short-circuited; and if the battery parameter is less than or equal to the standard parameter, determining that the battery is not short-circuited. It is thus possible to quickly determine whether a short circuit has occurred in the battery.

In some embodiments, if the battery parameter is a constant voltage charging time, the standard parameter is a standard constant voltage charging time. Determining whether the battery is short-circuited, specifically: determining whether the constant voltage charging time is greater than a standard constant voltage charging time; if the constant voltage charging time is longer than the standard constant voltage charging time, determining that the battery is short-circuited; and if the constant voltage charging time is less than or equal to the standard constant voltage charging time, determining that the battery is not short-circuited.

Since the battery charging generally includes a constant current charging stage and a constant voltage charging stage, the charging time in the constant voltage charging stage is substantially the same for the same type of battery with a fixed capacity, and thus it can be determined whether the battery is short-circuited according to the constant voltage charging time in the constant voltage charging stage.

For example, the lithium battery is charged by constant current and constant voltage, the time of the constant voltage charging stage is generally 20-30 minutes, and when the battery is in a micro short circuit, the time of the constant voltage charging of the battery is greatly prolonged, which may be 40-50 minutes or several hours. Therefore, whether the battery is slightly short-circuited can be judged by detecting the charging time of the constant-voltage charging stage of the battery.

In some embodiments, if the battery parameter is a constant voltage charge capacity, the standard parameter is a standard constant voltage charge capacity. Determining whether the battery is short-circuited, specifically: determining whether the constant voltage charging capacity is greater than a standard constant voltage charging capacity; if the constant voltage charging capacity is larger than the standard constant voltage charging capacity, determining that the battery is short-circuited; and if the constant voltage charging capacity is less than or equal to the standard constant voltage charging capacity, determining that the battery is not short-circuited.

When normal state, the constant voltage charge capacity of battery is fixed, if appear the short circuit, the battery can have the electric leakage phenomenon, and then leads to the constant voltage charge capacity of battery great, can be greater than the constant voltage charge capacity of battery when normal state far away even. Therefore, it is possible to quickly and accurately determine whether a short circuit, such as a micro short circuit, occurs in the battery through the constant voltage charging capacity.

For example, if the battery parameter is the charge-discharge capacity ratio, the standard parameter is the standard charge-discharge capacity ratio. Determining whether the battery is short-circuited, specifically: determining whether the charge-discharge capacity ratio is greater than a standard charge-discharge capacity ratio; if the charge-discharge capacity ratio is larger than the standard charge-discharge capacity ratio, determining that the battery is short-circuited; and if the charge-discharge capacity ratio is smaller than or equal to the standard charge-discharge capacity ratio, determining that the battery is not short-circuited.

In a normal state, the charge-discharge capacity ratio of the battery is generally in a fixed range, and the charge-discharge capacity ratio of the battery with the short circuit is larger, so that whether the battery has the short circuit or not can be determined according to the change of the charge-discharge capacity ratio.

For example, in a lithium ion battery, the charge-discharge capacity ratio fluctuates within the range of 1.01-1.05 in a normal state, and in a lithium ion battery with a micro short circuit, the charge-discharge capacity ratio is far larger than 1, so that whether the battery is short-circuited or not is determined according to the change of the charge-discharge capacity ratio. For example, when the charge-discharge capacity ratio is greater than 1.1, it can be determined that the battery has a micro short circuit.

In some embodiments, in order to accurately determine that the battery is short-circuited, a charging voltage and a charging time corresponding to the charging of the battery may also be obtained, and the charging voltage and the charging time are used to represent battery parameters of the battery for determining whether the battery is short-circuited.

Accordingly, whether the battery is short-circuited or not is determined, and whether the battery is short-circuited or not can be determined according to the charging voltage and the charging time corresponding to the charging of the battery.

Since the change trend of the charging voltage along with the charging time when the battery is short-circuited is different from the change trend of the charging voltage along with the charging time in the normal state, whether the battery is short-circuited can be determined according to the charging voltage and the charging time.

In some embodiments, the battery temperature rises to a certain threshold, often caused by a short circuit of the battery, and it may be determined that the battery may be shorted when the battery temperature rises to a certain threshold range by detecting the battery temperature.

If the battery is determined to be short-circuited, a corresponding short-circuit protection strategy can be carried out subsequently. For example: and if the battery is short-circuited, determining a battery short-circuit protection strategy corresponding to the short-circuit of the battery.

Specifically, the battery short-circuit protection strategy corresponding to the occurrence of the battery short circuit is a preset battery short-circuit protection strategy, and the battery short-circuit protection strategy is a strategy mode for protecting the battery when the battery is short-circuited.

Wherein, the battery short-circuit protection strategy comprises at least one of the following strategies: and discharging the battery to a preset voltage range corresponding to the safe storage of the battery, and controlling the battery to be in a locking state.

Of course, the battery short-circuit protection strategy may also include other strategy ways. For example, the prompt message is output to prompt for processing the battery according to the prompt message, and the prompt message may be a voice prompt message, a text prompt message, an indicator light prompt message, or the like.

In some embodiments, the battery short-circuit protection strategy includes a multi-stage battery short-circuit protection strategy, each stage of the multi-stage battery short-circuit protection strategy has different protection modes, and each stage of the multi-stage battery short-circuit protection strategy has different short-circuit degrees, so that the corresponding protection strategy is determined according to the short-circuit degree of the battery, and the battery is effectively and reasonably protected.

Illustratively, the multi-level battery short-circuit protection strategy includes at least one of: a first-stage battery short-circuit protection strategy, a second-stage battery short-circuit protection strategy and a third-stage short-circuit battery protection strategy.

Wherein, the first-stage short-circuit battery protection strategy comprises: and outputting prompt information for prompting the user to repair and maintain.

Wherein the second-stage battery short-circuit protection strategy comprises: and controlling the battery to enter a self-discharge program to discharge the battery, and/or outputting prompt information for prompting a user that the battery is unusable.

Wherein, the third-level battery short-circuit protection strategy comprises: and controlling the battery to be in a locked state, and/or outputting prompt information for prompting a user that the battery is scrapped.

Specifically, the short circuit degree corresponding to the short circuit of the battery may be determined first; and determining a multi-stage battery protection strategy corresponding to the short circuit according to the short circuit degree.

For example, the short-circuit degree includes a short-circuit degree a, a short-circuit degree b, and a short-circuit degree c, and corresponds to the first-stage battery short-circuit protection strategy, the second-stage battery short-circuit protection strategy, and the third-stage battery short-circuit protection strategy, respectively.

Wherein, the determining the short-circuit degree of the short circuit specifically comprises: and determining the difference degree between the battery parameter and the standard parameter, and determining the short circuit degree according to the difference degree.

Illustratively, the constant voltage charging time of the battery exceeds the standard constant voltage charging time by 10 minutes, defined as the short-circuit degree a; the constant voltage charging time of the battery exceeds the standard constant voltage charging time by 20 minutes and is defined as a short distance degree b; the constant voltage charging time of the battery exceeds the standard constant voltage charging time by 30 minutes, which is defined as a short circuit degree c.

For example, if the constant voltage charging time of the battery is 45 minutes and the standard constant voltage charging time is 20 minutes, it may be determined that the short-circuit degree of the battery is the short-circuit degree b, and therefore, it is determined that the multi-stage battery protection strategy corresponding to the short-circuit of the battery is the second-stage battery short-circuit protection strategy. The preset multi-level battery protection strategy and the multi-level battery temperature ranges may respectively correspond to the preset multi-level battery protection strategy and the multi-level battery temperature ranges according to specific practical applications. Since different short-circuit levels of the battery may cause different temperature ranges of the battery, the multi-level battery short-circuit protection strategy may be respectively associated with the battery temperature ranges of the plurality of levels.

Step S103: and controlling the battery to execute a battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.

And determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature, namely controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.

The method comprises the steps of obtaining the current battery temperature; and determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-stage battery protection strategy, and controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform. The preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform. Due to the fact that the preset multistage battery protection strategies corresponding to the temperature ranges of the battery in multiple levels are preset, the battery is controlled to execute the battery protection strategy corresponding to the current battery temperature, and operation of the movable platform is controlled. In addition, the battery parameters of the battery can be obtained; determining whether the battery is short-circuited according to the battery parameters; when the battery is short-circuited, determining a battery protection strategy corresponding to the short-circuited battery; controlling the battery to execute the battery protection strategy. The battery parameter may include at least one of a constant voltage charging time, a constant voltage charging capacity, a charging/discharging capacity ratio, and a battery temperature. And then realize when the short circuit appears in the battery, realize the protection to the battery, so, can avoid the overtemperature of battery to a certain extent, improved the security of battery use from this.

The details of step S103 will be specifically described below in terms of a plurality of levels of battery temperature ranges.

In an embodiment, if the current battery temperature is below the normal usage temperature threshold, step S103 may include: and if the current battery temperature is below the normal use temperature threshold (for example, below 65 ℃), controlling the battery to continue normal operation. At this time, the movable platform operates normally.

In another embodiment, if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold (e.g., 65-75 ℃), step S103 may include: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the operation of the movable platform.

The battery temperature rise is calculated by Q ═ I ═ R ×, T, and the discharge current of the battery is reduced, so that the heat generation amount of the battery is rapidly reduced. In this embodiment, the operation of the movable platform is limited, so that on one hand, the basic operation of the movable platform can be ensured, and on the other hand, the operation requiring a large current can be avoided or reduced, thereby achieving the purposes of avoiding the temperature rise of the battery and reducing the temperature of the battery.

Limiting the operation of the movable platform includes, but is not limited to: shutting down operations requiring a large current, shutting down operations that are currently unnecessary, controlling the movable platform to move at a constant speed, limiting the speed of the movable platform to move at a constant speed, limiting the variable speed movement of the movable platform, limiting the range of movement of the movable platform, and so forth.

In another embodiment, when the movable platform includes an unmanned aerial vehicle, if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, step S103 may include: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to control the movable platform to carry out limited flight.

Specifically, the step S103 may further include: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the flight attitude of the unmanned aerial vehicle.

The flight attitude of the unmanned aerial vehicle comprises: vertical motion, pitch motion, roll motion, yaw motion, fore-and-aft motion, and lateral motion. In general, these flight attitudes of the unmanned aerial vehicle require a large current, which limits the flight attitudes of the unmanned aerial vehicle in order to avoid a rise in battery temperature and to reduce the battery temperature. For example: limiting the frequency of these flight attitudes, limiting the pitch of the UAV (the larger the pitch of the UAV, the more current is required, and the less current is required to fly to maintain a pitch of a few degrees), limiting the rolling motion of the UAV, limiting the pitching motion of the UAV, and so forth.

And/or, the step S103 may further include: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the variable-speed flight of the unmanned aerial vehicle.

When the unmanned aerial vehicle flies in a speed-changing manner, a larger current is needed to limit the unmanned aerial vehicle to fly in a speed-changing manner, so that the temperature of the battery is prevented from rising and the temperature of the battery is reduced. For example: limiting the frequency of the variable-speed flight of the unmanned aerial vehicle, limiting the magnitude of the acceleration if the variable-speed flight of the unmanned aerial vehicle (avoiding the excessive current caused by the rapid change of the flight speed in a short time), keeping the unmanned aerial vehicle flying at a constant speed, reducing the flight speed, and the like.

And/or, the step S103 may further include: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to limit the flight altitude of the unmanned aerial vehicle.

The higher the unmanned aerial vehicle flies, the greater the gravity that needs to be overcome, the more energy that needs to be consumed, and the greater the current that is needed. The battery temperature can be prevented from rising and reduced by limiting the flying height of the unmanned aerial vehicle.

For example, as shown in fig. 3, the flying height of the unmanned aerial vehicle is lowered from H1 to H2, and the flying speed of the unmanned aerial vehicle is reduced from V1 to V2, and the speed V1 is greater than V2, thereby ensuring the flight safety of the unmanned aerial vehicle.

In yet another embodiment, if the current battery temperature is between the limited use temperature threshold and the first life affecting temperature threshold (e.g., 75-85 ℃), step S103 may include: and if the current battery temperature is between the limited use temperature threshold and the first life-influencing temperature threshold, sending an instruction for indicating the movable platform to carry out return preparation so as to control the movable platform to carry out return preparation.

Specifically, if the current battery temperature is between the limited use temperature threshold and the first life-affecting temperature threshold, an instruction for instructing the movable platform to make return voyage preparation is sent out so as to control the movable platform to make return voyage preparation, and a prompt for suggesting return voyage of battery over-temperature use is sent out to the user.

In an embodiment, if the current battery temperature is between the limited use temperature threshold and the first life-affecting temperature threshold, for example, 75-85 ℃, the battery life may be greatly damaged when the battery is used for a long time, and therefore, an instruction for instructing the movable platform to make preparations for return voyage is issued to control the movable platform to make preparations for return voyage. Furthermore, a prompt of battery over-temperature use suggestion return flight can be sent to the user at the same time, so that the user can determine whether to cancel the flight mission according to the emergency requirement of the flight mission.

In another embodiment, if the current battery temperature is above the second life-affecting temperature threshold (e.g., above 90 ℃), step S103 may include: and if the current battery temperature is higher than the second service life influencing temperature threshold value, sending an instruction for controlling the movable platform to warn the user to return, so as to control the movable platform to warn the user to return.

Specifically, if the current battery temperature is higher than the second life-affecting temperature threshold, an instruction for controlling the unmanned aerial vehicle to send a battery temperature serious warning suggestion to the user to return to the home as soon as possible is sent out, so that the unmanned aerial vehicle is controlled to send a prompt for sending the battery temperature serious warning suggestion to the user to return to the home as soon as possible.

When the temperature of the battery reaches a certain temperature interval, for example, above 90 ℃, the battery is used at this time, and fatal damage may be caused to the service life of the battery, and at this time, an instruction for controlling the movable platform to warn the user to return to the home may be sent out, so that the movable platform is controlled to warn the user to return to the home. Further, the user is prompted, the battery temperature is seriously warned, the rapid return flight is recommended, namely, an instruction for controlling the unmanned aerial vehicle to send the battery temperature serious warning recommendation rapid return flight to the user is sent, so that the unmanned aerial vehicle is controlled to send a prompt for sending the battery temperature serious warning recommendation rapid return flight to the user, and the user can conveniently confirm whether to cancel the flight mission according to the flight mission emergency demand.

Wherein, the method also comprises: and if the current battery temperature is higher than the second service life influencing temperature threshold value, recording the current discharge temperature of the battery. So as to retain and subsequently query usage records for which the battery temperature is above the second life affecting temperature threshold.

Further, the method also includes: if the movable platform stops operating and the current temperature of the battery is above the second life-affecting temperature threshold, the battery is locked to prohibit the battery from re-powering the movable platform and/or prohibit the battery from obtaining charge. In one application, the battery locking means that the MOS on the main loop is turned off, and the unmanned aerial vehicle can not take off any more, but the state information of the battery can be read. The current temperature of the battery is above the second life-affecting temperature threshold, at which the battery life is fatally impaired and extremely dangerous, and therefore the battery is locked to prohibit the battery from re-powering the mobile platform (to ensure the safety of the mobile platform) and/or to prohibit the battery from being recharged (to ensure the safety of the battery).

Further, the method also includes: and if the battery is locked, controlling the battery to discharge to a safe storage voltage for storage. The high-power storage is dangerous, if the battery is locked, when the electric quantity is not used up, the self-discharge resistor of the battery is used to slowly discharge the electric quantity, and the electric quantity is discharged to the safe storage voltage (low electric quantity) for storage. In this way, the safety of the battery can be ensured.

By the mode, the behavior of using the battery safely by a user can be developed. The execution body for locking the battery is a battery.

In some embodiments, on the basis of any of the above embodiments, the step S103 may further control the battery to execute a battery short-circuit protection strategy after determining that the battery is short-circuited.

Specifically, discharging the battery through a preset discharge resistor in the battery management system to a preset voltage range; and/or controlling a charging switch and a discharging switch of the battery to be in an off state so that the battery is in a locking state, namely permanently disabled.

The preset voltage range is a safe voltage range, and a range value near 0V may be set, and the specific range value is not limited herein.

In some embodiments, other battery protection strategies may also be employed, such as outputting a prompt to prompt the user that the battery is shorted. The prompting message includes voice prompting message, text prompting message and/or indicating lamp prompting message, such as lamp language composed of different LEDs to prompt the user that the battery is short-circuited.

It can be understood that when the battery is in a charging state, the battery protection strategy is executed after the battery is detected to be short-circuited and the charging is stopped; the battery protection strategy is implemented while securing a mobile platform using the battery when the battery is in a discharged state.

For example, if it is determined that the battery is short-circuited during the charging of the battery, the charging of the battery is stopped, and the battery protection strategy is executed. Wherein, stopping charging the battery, can send the control signal to the charging switch circuit for the little control unit, in order to make the charging switch circuit disconnect; it is of course also possible for the micro control unit to send a control signal to the charger to stop the charging of the charger.

For example, according to the constant voltage charging time or the charging voltage and the corresponding charging time, it is determined that the intelligent battery is short-circuited, the battery is stopped from being continuously charged, and the battery is discharged to a preset voltage range, or the battery is controlled to be in a locked state. The battery with short circuit is prevented from being used by users, thereby improving the use safety of the battery.

Illustratively, unmanned aerial vehicle installs the smart battery, and at unmanned aerial vehicle's flight in-process, the little the control unit of smart battery confirms that the battery appears the short circuit according to the battery parameter, for example confirms that the battery appears the short circuit according to charge-discharge capacity ratio, and the little the control unit of smart battery sends the instruction that is used for instructing unmanned aerial vehicle to return voyage to unmanned aerial vehicle's flight controller. And after receiving the instruction, the flight controller controls the aircraft to return and feeds back the instruction to the micro control unit of the intelligent battery. And the micro control unit executes the battery protection strategy after receiving the feedback information.

Certainly, the micro control unit of intelligent battery sends the instruction that is used for instructing unmanned aerial vehicle to return to the flight controller of unmanned aerial vehicle, and flight controller sends this instruction to ground control end again, knows by the user that the battery sends the instruction of returning to the journey to give flight controller after the short circuit appears, and flight controller begins to return to the journey after receiving the instruction of returning to the journey of ground control end.

Specifically, can be when unmanned aerial vehicle returns to voyage or when returning to the voyage to end, discharge the battery to predetermineeing the voltage range to control the battery and be in the lock state when not having man-machine to stop the operation, can improve the safety in utilization of battery from this to unmanned aerial vehicle's flight security has been ensured.

It is to be understood that, if the battery protection strategy further includes a multi-level battery protection strategy, the battery may also be controlled to execute the determined multi-level battery protection strategy.

For example, if the determined multi-level battery protection strategy corresponding to the short circuit of the battery is the second-level battery protection strategy, the battery may be controlled to enter a self-discharge program to discharge the battery, and/or a prompt message for prompting a user that the battery is unusable is output.

In some embodiments, after controlling the battery to execute the battery protection strategy, the battery control method further includes: and when the battery is detected to be connected to the movable platform, outputting alarm prompt information to prompt a user that the battery is short-circuited. The safety of the battery can be ensured, and the operation safety of the movable platform can be improved.

In the battery protection method provided in each of the above embodiments, since the preset multi-level battery protection policies corresponding to the multi-level temperature ranges of the battery are preset, the battery is controlled to execute the battery protection policy corresponding to the current battery temperature, so as to implement safe use of the battery or control operation of the movable platform, in this way, on one hand, the safe use of the battery can be realized when the movable platform runs, the service life of the battery can be prolonged, the possibility of ignition caused by over-temperature use of the battery can be prevented, thereby avoiding the occurrence of battery safety accidents, on the other hand, combining the safe use of the battery with the operation of the movable platform, when ensuring the safe use of the battery, and the method can also provide support for ensuring the safe operation of the movable platform as much as possible, thereby providing support for avoiding the safety accidents of the movable platform as much as possible. In addition, the embodiment of the application can also realize the protection of the battery when the battery is short-circuited, so that the overtemperature of the battery can be avoided to a certain extent, and the use safety of the battery is improved.

Referring to fig. 4, fig. 4 is a schematic flow chart of another embodiment of the battery protection method of the present application, and the method of the present embodiment is substantially the same as the method of fig. 2, except that the present embodiment only describes, from the battery aspect (related to the battery), a preset multi-level battery protection policy and a battery protection policy that controls the battery to execute. For the same parts of the method of the present embodiment as the method of fig. 2, please refer to the method of fig. 2 and related contents, which are not repeated herein. For the sake of convenience of distinction, the method of this embodiment in terms of only the battery (in relation to the battery) is referred to as a second battery protection method.

The method comprises the following steps: step S201, step S202, and step S203.

Step S201: and acquiring the current battery temperature.

Step S202: and determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery.

Step S203: and controlling the battery to execute a battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery.

The method comprises the steps of obtaining the current battery temperature; determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery; and controlling the battery to execute a battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery. Due to the fact that the preset multistage battery protection strategies corresponding to the temperature ranges of the battery in multiple levels are preset, the battery is controlled to execute the battery protection strategy corresponding to the current battery temperature, and therefore safe use of the battery is achieved. In addition, support is provided for integrating the safe use of the battery with the operation of the movable platform. The preset multi-stage battery protection strategy comprises at least one of the following strategies: controlling the battery to continue normal operation, reducing the discharging current of the battery, recording the current discharging temperature of the battery, locking the battery and displaying alarm information.

Wherein the plurality of levels of battery temperature ranges include at least one of: the temperature sensor is used for detecting the temperature of the working fluid, and is characterized in that the temperature sensor is below a normal use temperature threshold, between the normal use temperature threshold and a limited use temperature threshold, between the limited use temperature threshold and a first life-affecting temperature threshold, and above a second life-affecting temperature threshold.

Wherein, control battery and carry out the battery protection strategy that corresponds with current battery temperature, include: and if the current battery temperature is below the normal use temperature threshold, controlling the battery to continue normal operation.

Wherein, control battery and carry out the battery protection strategy that corresponds with current battery temperature, include: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery.

Wherein, the method also comprises: and if the current battery temperature is higher than the second service life influencing temperature threshold value, recording the current discharge temperature of the battery.

Wherein, the method also comprises: if the movable platform stops operating and the current temperature of the battery is above the second life-affecting temperature threshold, the battery is locked to prohibit the battery from discharging and/or prohibit the battery from obtaining charge.

Wherein, the method also comprises: and if the battery is locked, controlling the battery to discharge to a safe storage voltage for storage.

Wherein the normal use temperature threshold comprises 65 ℃. The limited use temperature threshold comprises 75 ℃. The first life-affecting temperature threshold comprises 85 ℃. The second life-affecting temperature threshold comprises 90 ℃.

Wherein, the battery is equipped with temperature sensor, acquires current battery temperature, includes: and acquiring the temperature acquired by the temperature sensor, and determining the current battery temperature according to the temperature acquired by the temperature sensor.

Wherein the current battery temperature includes a battery surface temperature and/or a battery internal temperature.

In addition, when the battery is used, some internal short circuit situations, such as micro short circuit, often occur, and safety accidents such as battery failure and fire can be caused. Therefore, in an embodiment, the preset multi-stage battery protection strategy further includes a protection strategy when the battery is short-circuited, and it is first required to determine that the battery is short-circuited, and then the battery is effectively protected by adopting a corresponding protection strategy, so that the safety of the battery in use is improved.

Specifically, referring to fig. 5, the process includes: step S301, step S302, step S303, and step S304.

Step S301: and acquiring battery parameters of the battery.

The battery parameters comprise at least one of constant voltage charging time, constant voltage charging capacity and charging and discharging capacity ratio.

In particular, battery parameters collected by the battery circuit may be obtained. For example, when the battery is charged, a constant voltage charging stage is started, and the constant voltage charging time is obtained by acquiring the time of the constant voltage charging stage.

Specifically, the battery parameters obtained through calculation may also be obtained, for example, the charge-discharge capacity, that is, the charge capacity and the discharge capacity of the battery may be obtained through ampere-hour integral calculation, and then the charge-discharge capacity ratio may be calculated according to the charge capacity and the discharge capacity.

Step S302: and determining whether the battery is short-circuited according to the battery parameters.

As shown in fig. 6, fig. 6 is a graph showing the variation of the charging voltage of the battery with short circuit along with the charging time; as shown in fig. 7, fig. 7 is a graph showing the variation of the charging voltage of the battery with the charging time in the normal state. Therefore, whether the short circuit phenomenon occurs in the battery can be determined according to the change trend graph corresponding to the charging voltage and the charging time.

As can be seen from fig. 6 and 7, the difference is more apparent in the constant voltage charging stage in order to quickly and accurately determine whether the battery is short-circuited. The obtained charging voltage at least comprises a constant voltage charging voltage; accordingly, the charging time includes at least a constant voltage charging time.

It should be noted that the constant voltage charging voltage and the constant voltage charging time are the charging voltage and the charging time when the battery enters the constant voltage charging stage.

Step S303: and if the battery is short-circuited, determining a battery protection strategy corresponding to the short-circuited battery.

The battery protection strategy corresponding to the short circuit of the battery is a preset battery protection strategy, and the battery protection strategy is a strategy mode for protecting the battery when the battery is in the short circuit.

Wherein the battery protection strategy comprises at least one of: and discharging the battery to a preset voltage range corresponding to the safe storage of the battery, and controlling the battery to be in a locking state.

Of course, the battery protection strategy may also include other strategy approaches. For example, the prompt message is output to prompt for processing the battery according to the prompt message, and the prompt message may be a voice prompt message, a text prompt message, an indicator light prompt message, or the like.

In some embodiments, the battery protection strategies include multiple battery protection strategies, each level of the multiple battery protection strategies has different protection modes, and each level of the multiple battery protection strategies has different short-circuit degrees, so that the corresponding protection strategy is determined according to the short-circuit degree of the battery, and the battery is effectively and reasonably protected.

Illustratively, the multi-level battery protection strategy includes at least one of: a first level battery protection strategy, a second level battery protection strategy, and a third level battery protection strategy.

Wherein the first level battery protection strategy comprises: and outputting prompt information for prompting the user to repair and maintain.

Wherein the second level battery protection strategy comprises: and controlling the battery to enter a self-discharge program to discharge the battery, and/or outputting prompt information for prompting a user that the battery is unusable.

Wherein the third level battery protection strategy comprises: and controlling the battery to be in a locked state, and/or outputting prompt information for prompting a user that the battery is scrapped.

For example, the short-circuit degree includes a short-circuit degree a, a short-circuit degree b, and a short-circuit degree c, and corresponds to the first-stage battery protection strategy, the second-stage battery protection strategy, and the third-stage battery protection strategy, respectively.

Illustratively, the constant voltage charging time of the battery exceeds the standard constant voltage charging time by 10 minutes, defined as the short-circuit degree a; the constant voltage charging time of the battery exceeds the standard constant voltage charging time by 20 minutes and is defined as the short circuit degree b; the constant voltage charging time of the battery exceeds the standard constant voltage charging time by 30 minutes, which is defined as a short circuit degree c.

For example, if the constant voltage charging time of the battery is 45 minutes and the standard constant voltage charging time is 20 minutes, it may be determined that the short-circuit degree of the battery is the short-circuit degree b, and therefore, it is determined that the multi-stage battery protection strategy corresponding to the short-circuit of the battery is the second-stage battery protection strategy.

Step S304: controlling the battery to execute the battery protection strategy.

For example, as shown in fig. 8, if it is determined that the battery is short-circuited during the charging of the battery, the charging of the battery is stopped, and the battery protection strategy is executed. Wherein, stopping charging the battery, can send the control signal to the charging switch circuit for the little control unit, in order to make the charging switch circuit disconnect; it is of course also possible for the micro control unit to send a control signal to the charger to stop the charging of the charger.

Illustratively, as shown in fig. 9, the unmanned aerial vehicle is equipped with a battery, during the flight of the unmanned aerial vehicle, the micro control unit of the battery determines that the battery is short-circuited according to the battery parameters, for example, the battery is short-circuited according to the charge-discharge capacity ratio, and the micro control unit of the battery sends an instruction for instructing the unmanned aerial vehicle to return to the flight controller of the unmanned aerial vehicle. And after receiving the instruction, the flight controller controls the unmanned aerial vehicle to return and feeds back the instruction to the micro control unit of the battery. And the micro control unit executes the battery protection strategy after receiving the feedback information.

Certainly, the micro control unit of battery sends the instruction that is used for instructing unmanned aerial vehicle to return to the flight controller of unmanned vehicles, and flight controller sends this instruction to ground control end again, knows by the user that the battery sends the instruction of returning to the journey to give flight controller after the short circuit appears, and flight controller begins to return to the journey after receiving the instruction of returning to the journey of ground control end.

Specifically, the battery can be discharged to a preset voltage range when the unmanned aerial vehicle returns or finishes returning, and the battery is controlled to be in a locked state when the unmanned aerial vehicle stops running, so that the use safety of the battery can be improved, and the flight safety of the unmanned aerial vehicle is ensured.

Because the battery is installed in the movable platform, the movable platform is provided with power. However, due to various use scenes, the movable platform may be dropped, bumped and the like, and accordingly, the battery is also dropped, bumped and the like. In case of falling, collision and other situations of the battery, when extrusion, short circuit or needling often occurs (such as the battery is installed in a movable device and is strongly extruded due to falling, collision and the like of the movable device), an internal diaphragm is broken to cause short circuit of a positive electrode and a negative electrode of a battery core, a large amount of heat is generated in the battery core within a short time, the heat is limited by a battery structure, the heat cannot be rapidly diffused to the outside of the battery, the temperature of the battery is too high, decomposition and combustion of active substances and electrolyte are caused, thermal runaway is caused, and the temperature of the battery rises explosively to cause combustion or explosion. Once such batteries are used, they pose a great safety hazard to users using the batteries, thus threatening personal and property safety, and once a problem of combustion or explosion occurs, the batteries are burnt out, making it difficult to investigate and analyze.

For such problems, the conventional processing method usually judges whether the battery is over-dropped or bumped by performing appearance inspection on the battery, or suggests a user not to drop or bump the battery and not to use the over-dropped or bumped battery through a battery case problem prompt or a specification prompt, so that the potential safety hazard cannot be avoided.

Therefore, the accidents such as falling and impact of the movable platform are one of the causes of short circuit of the battery, so that the battery protection method provided by the embodiment can protect the battery after the short circuit of the battery is determined, and the battery needs to be protected before the short circuit of the battery occurs.

Specifically, acquiring a battery parameter of the battery, and acquiring an acceleration value of the battery before determining whether the battery is short-circuited according to the battery parameter; determining whether the battery falls or impacts according to the acquired acceleration value; if the battery is determined to be dropped or bumped, executing a safety strategy on the battery, wherein the safety strategy comprises at least one of the following: recording abnormal information, performing abnormal prompt, limiting charge and discharge of the battery, and controlling self-discharge of the battery.

The battery comprises a micro control unit, and the acceleration value of the battery is acquired by the micro control unit. Specifically, the acceleration value of the battery may be detected by a sensing circuit provided in the battery, transmitted to the micro control unit; the acceleration value of the movable platform may also be acquired by the micro control unit as the acceleration value of the battery. The battery is a smart battery, and the smart battery will be described as an example.

By acquiring the acceleration value of the intelligent battery and determining whether the intelligent battery falls or collides, whether the potential safety hazard exists in the intelligent battery can be detected in real time and reliably, and a safety strategy is executed on the intelligent battery when the potential safety hazard exists in the intelligent battery, so that the use safety of the battery can be improved, and the occurrence of safety accidents is reduced.

The obtained acceleration value is at least the acceleration value in the gravity direction, and the obtained acceleration value can be used for determining whether the intelligent battery falls or not according to the acceleration value in the gravity direction. When the movable platform falls or impacts, the intelligent battery carried by the movable platform also correspondingly falls/impacts, and then the movable platform is determined to fall/impact. Therefore, the judgment basis can be provided as the responsibility determination problem caused by the movable platform fryer, and the judgment of whether the fryer is caused by the falling/collision of the movable platform or the fryer caused by the abnormal output power of the battery or the battery short circuit caused by the movable platform fryer is facilitated.

Specifically, whether the acceleration value of the intelligent battery in the gravity direction continuously exceeds a preset threshold value within a preset time is determined, and if yes, the intelligent battery is determined to fall.

In addition, whether the change value of the acceleration value of the intelligent battery in any direction within the preset time exceeds a preset threshold value or not can be determined, and if yes, the intelligent battery is determined to be impacted.

The anomaly information may include information related to the impact event (such as the time of impact, etc.). Therefore, if a safety accident occurs later, the reason of the safety accident of the battery can be traced according to the abnormal information.

In some embodiments, when it is determined that the smart battery has crashed, a security policy is implemented on the smart battery, which may include making exception prompts. For example, an audible and/or visual safety prompt may be issued to alert the user when it is determined that the smart battery has been bumped.

Accordingly, the smart battery may also include audible and/or visual means (e.g., a speaker and/or a display) to present audible and/or visual safety prompts to the user.

In some embodiments, when it is determined that the smart battery has a crash, a security policy is enforced on the smart battery, which may include limiting charge and discharge usage of the smart battery.

For example, limiting charge and discharge usage of the smart battery may include at least one of: the method comprises the following steps of limiting the charging and discharging times of the intelligent battery, limiting the charging and discharging time of the intelligent battery every time, and forbidding the charging and discharging of the intelligent battery. The safety of the battery can be fundamentally improved, and the occurrence of safety accidents is reduced.

In some embodiments, when it is determined that the smart battery has a crash, a security policy is executed on the smart battery, which may include controlling self-discharge of the smart battery.

Illustratively, controlling the self-discharge of the smart battery may issue at least one of: strengthening maintenance, keeping cleanness and keeping dryness. In this embodiment, the smart battery may also include audible and/or visual means (e.g., a speaker and/or a display) to present the prompt to the user.

Of course, in addition to whether the battery is bumped or dropped, the smart battery may record other information of the usage process, such as discharge current, battery temperature, and the like, so as to analyze and locate the cause of the short circuit after identifying the short circuit of the battery, determine the cause of the short circuit, such as the cause of the bumped or dropped mobile platform, or the cause inside the battery.

The battery protection method provided by the embodiment can not only identify the occurrence of short circuit of the battery according to the battery parameters of the battery, but also further determine the short circuit degree according to the battery parameters, and then determine the corresponding battery protection strategy according to the short circuit degree and the multi-stage battery protection strategy, thereby realizing multi-stage protection of the battery. In addition, when the battery is possibly short-circuited, a corresponding safety strategy can be executed. Therefore, the battery is effectively protected, and the safety performance of the battery is improved.

Referring to fig. 10, fig. 10 is a schematic structural diagram of an embodiment of the battery protection system of the present application, and it should be noted that the system may be disposed in a battery or a movable platform, so that an execution body of the system may be a battery or a movable platform, and the system of the present embodiment is capable of executing the steps in the first battery protection method, and detailed descriptions of relevant contents refer to relevant contents of the first battery protection method, which will not be described herein again. For the sake of distinction, the battery protection system of the present embodiment that performs the steps in the above-described first battery protection method is referred to as a first battery protection system.

The battery protection system 300 includes: a memory 1 and a processor 2; the processor 2 is electrically connected with the memory 1, the battery and the movable platform.

The processor 2 may be a micro-control unit, a central processing unit, a digital signal processor, or the like.

The memory 1 may be a Flash chip, a read-only memory, a magnetic disk, an optical disk, a usb disk, or a removable hard disk.

The memory 1 is used for storing a computer program; the battery protection system is used for storing preset multi-stage battery protection strategies.

The processor 2 is adapted to execute the computer program and, when executing the computer program, to carry out the steps of:

acquiring the current battery temperature; determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform; and controlling the battery to execute a battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.

The preset multi-stage battery protection strategy comprises at least one of the following strategies: the method comprises the steps of controlling a battery to continuously and normally operate, reducing discharge current of the battery, sending an instruction for indicating a movable platform to prepare for return voyage before stopping operation, sending a prompt for suggesting return voyage of battery over-temperature use to a user, sending an instruction for controlling the movable platform to warn the user of return voyage, sending an instruction for suggesting return voyage as soon as battery temperature is serious to the user, recording current discharge temperature of the battery, locking the battery, and displaying alarm information.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is below the normal use temperature threshold, controlling the battery to continue normal operation.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the operation of the movable platform.

Wherein the movable platform comprises an unmanned aerial vehicle; the processor, when executing the computer program, implements the steps of: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to control the movable platform to carry out limited flight.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the flight attitude of the unmanned aerial vehicle.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the variable-speed flight of the unmanned aerial vehicle.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to limit the flight altitude of the unmanned aerial vehicle.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is between the limited use temperature threshold and the first life-influencing temperature threshold, sending an instruction for indicating the movable platform to carry out return preparation so as to control the movable platform to carry out return preparation.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is between the limited use temperature threshold and the first influence service life temperature threshold, sending an instruction for indicating the movable platform to make return voyage preparation so as to control the movable platform to make return voyage preparation and send a prompt of battery over-temperature use suggestion return voyage to a user.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is higher than the second service life influencing temperature threshold value, sending an instruction for controlling the movable platform to warn the user to return, so as to control the movable platform to warn the user to return.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is higher than the second life-influencing temperature threshold value, sending an instruction for controlling the unmanned aerial vehicle to send a battery temperature serious warning suggestion to the user to return to the home as soon as possible so as to control the unmanned aerial vehicle to send a prompt for sending the battery temperature serious warning suggestion to the user to return to the home as soon as possible.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is higher than the second service life influencing temperature threshold value, recording the current discharge temperature of the battery.

Wherein, when the processor executes the computer program, the following steps are realized: if the movable platform stops operating and the current temperature of the battery is above the second life-affecting temperature threshold, the battery is locked to prohibit the battery from re-powering the movable platform and/or prohibit the battery from obtaining charge.

Wherein, when the processor executes the computer program, the following steps are realized: and if the battery is locked, controlling the battery to discharge to a safe storage voltage for storage.

Wherein, the battery is equipped with temperature sensor, and the treater realizes the following step when carrying out computer program: and acquiring the temperature acquired by the temperature sensor, and determining the current battery temperature according to the temperature acquired by the temperature sensor.

The present application further provides another battery protection system, it should be noted that the system of the present embodiment is disposed in a battery, and the implementation subject of the system is the battery, and the system of the present embodiment is capable of performing the steps in the battery protection method of the above aspect (related to the battery), and please refer to the relevant content section of the battery protection method of the above aspect (related to the battery), which is not described in detail herein. For the sake of distinction, the battery protection system of the present embodiment that performs the steps in the above-described second battery protection method is referred to as a second battery protection system.

The system comprises: a memory and a processor; the processor is electrically connected to the memory and the battery.

The memory is used for storing a computer program; the battery protection system is used for storing preset multi-stage battery protection strategies.

The processor is used for executing the computer program and realizing the following steps when executing the computer program:

acquiring the current battery temperature; determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery; and controlling the battery to execute a battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery.

The preset multi-stage battery protection strategy comprises at least one of the following strategies: controlling the battery to continue normal operation, reducing the discharging current of the battery, recording the current discharging temperature of the battery, locking the battery and displaying alarm information.

Wherein, when the processor executes the computer program, the following steps are realized: and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery.

Wherein, when the processor executes the computer program, the following steps are realized: if the movable platform stops operating and the current temperature of the battery is above the second life-affecting temperature threshold, the battery is locked to prohibit the battery from discharging and/or prohibit the battery from obtaining charge.

The present application also provides a movable platform comprising a first battery protection system as defined in any one of the above. That is, in the present embodiment, the first battery protection system (excluding the system that can achieve battery lock in the first battery protection system) as described in any of the above is arranged in the movable platform. For a detailed description of relevant contents, reference is made to the above-mentioned relevant contents section, which is not described herein again in a redundant manner.

The present application also provides a battery comprising a first battery protection system as defined in any one of the above. That is, in the present embodiment, the first battery protection system as described in any of the above is disposed in a battery. For a detailed description of relevant contents, reference is made to the above-mentioned relevant contents section, which is not described herein again in a redundant manner.

The present application also provides another battery including a second battery protection system as described in any of the above. That is, in the present embodiment, the second battery protection system as described in any of the above is disposed in the battery. For a detailed description of relevant contents, reference is made to the above-mentioned relevant contents section, which is not described herein again in a redundant manner.

The present application also provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement the first battery protection method as defined in any one of the above. That is, the battery protection method in the present embodiment is a battery protection method that combines safe use of a battery with operation of a movable platform. For a detailed description of relevant contents, reference is made to the above-mentioned relevant contents section, which is not described herein again in a redundant manner.

The computer-readable storage medium may be the first battery protection system or an internal storage unit, such as a hard disk or a memory, of a removable platform or a battery including the first battery protection system. The computer readable storage medium may also be an external storage device such as a hard drive equipped with a plug-in, smart memory card, secure digital card, flash memory card, or the like.

The present application also provides another computer-readable storage medium storing a computer program, which when executed by a processor causes the processor to implement the second battery protection method as described in any one of the above. That is, the battery protection method in the present embodiment is a battery-side (battery-related) battery protection method. For a detailed description of relevant contents, reference is made to the above-mentioned relevant contents section, which is not described herein again in a redundant manner.

The computer-readable storage medium may be the second battery protection system or an internal storage unit of a battery including the second battery protection system, such as a hard disk or a memory. The computer readable storage medium may also be an external storage device such as a hard drive equipped with a plug-in, smart memory card, secure digital card, flash memory card, or the like.

It is to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

The above description is only for the specific embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of protecting a battery used to power a movable platform, the method comprising:

acquiring the current battery temperature;

determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform;

and controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.
The method of claim 1, wherein the predetermined multi-level battery protection strategy comprises at least one of:

the method comprises the steps of controlling the battery to continue normal operation, reducing the discharging current of the battery, sending an instruction for indicating that the movable platform is prepared for return voyage before the battery stops operating, sending a prompt for suggesting return voyage of battery over-temperature use to a user, sending an instruction for controlling the movable platform to warn the user of return voyage, sending an instruction for suggesting return voyage of battery temperature serious warning to the user as soon as possible, recording the current discharging temperature of the battery, locking the battery, and displaying alarm information.
The method of claim 1, wherein the plurality of levels of battery temperature ranges comprise at least one of: the temperature sensor is used for detecting the temperature of the working fluid, and is characterized in that the temperature sensor is below a normal use temperature threshold, between the normal use temperature threshold and a limited use temperature threshold, between the limited use temperature threshold and a first life-affecting temperature threshold, and above a second life-affecting temperature threshold.
The method of claim 2, wherein the controlling the battery to implement a battery protection strategy corresponding to the current battery temperature comprises:

and if the current battery temperature is below a normal use temperature threshold value, controlling the battery to continue normal operation.
The method of claim 2, wherein the controlling the battery to implement a battery protection strategy corresponding to the current battery temperature comprises:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the operation of the movable platform.
The method of claim 2, wherein the movable platform comprises an unmanned aerial vehicle;

the controlling the battery to execute a battery protection strategy corresponding to the current battery temperature includes:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to control the movable platform to carry out limited flight.
The method of claim 6, wherein reducing the battery discharge current to control the mobile platform for restrictive flight if the present battery temperature is between a normal use temperature threshold and a limit use temperature threshold comprises:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the flight attitude of the unmanned aerial vehicle.
The method of claim 6, wherein reducing the battery discharge current to control the mobile platform for restrictive flight if the present battery temperature is between a normal use temperature threshold and a limit use temperature threshold comprises:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the variable-speed flight of the unmanned aerial vehicle.
The method of claim 6, wherein reducing the battery discharge current to control the mobile platform for restrictive flight if the present battery temperature is between a normal use temperature threshold and a limit use temperature threshold comprises:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to limit the flight altitude of the unmanned aerial vehicle.
The method of claim 2, wherein the controlling the battery to implement a battery protection strategy corresponding to the current battery temperature comprises:

and if the current battery temperature is between the limited service temperature threshold and the first life-influencing temperature threshold, sending an instruction for indicating the movable platform to carry out return preparation so as to control the movable platform to carry out return preparation.
The method of claim 10, wherein if the current battery temperature is between a limited use temperature threshold and a first life-affecting temperature threshold, issuing a command instructing the movable platform to return to the home position to control the movable platform to return to the home position comprises:

and if the current battery temperature is between the limited service temperature threshold and the first influence life temperature threshold, sending an instruction for indicating the movable platform to make return preparation so as to control the movable platform to make return preparation and send a prompt of battery over-temperature use suggestion return to the user.
The method of claim 2, wherein the controlling the battery to implement a battery protection strategy corresponding to the current battery temperature comprises:

and if the current battery temperature is higher than a second service life influencing temperature threshold value, sending an instruction for controlling the movable platform to warn the user to return, so as to control the movable platform to warn the user to return.
The method of claim 12, comprising:

and if the current battery temperature is higher than a second life-influencing temperature threshold value, sending an instruction for controlling the unmanned aerial vehicle to send a battery temperature serious warning suggestion to the user to return to the home as soon as possible so as to control the unmanned aerial vehicle to send a prompt for sending the battery temperature serious warning suggestion to the user to return to the home as soon as possible.
The method of claim 12, further comprising:

and if the current battery temperature is higher than a second service life influence temperature threshold value, recording the current discharge temperature of the battery.
The method of claim 14, further comprising:

if the movable platform stops operating and the current temperature of the battery is above the second life affecting temperature threshold, locking the battery to prohibit the battery from supplying power to the movable platform again and/or prohibit the battery from obtaining charging.
The method of claim 15, further comprising:

and if the battery is locked, controlling the battery to discharge to a safe storage voltage for storage.
The method of claim 3, wherein the normal use temperature threshold comprises 65 ℃.
The method of claim 3, wherein the limited-use temperature threshold comprises 75 ℃.
The method of claim 3, wherein the first life-affecting temperature threshold comprises 85 ℃.
The method of claim 3, wherein the second life-affecting temperature threshold comprises 90 ℃.
The method of claim 1, wherein the battery is provided with a temperature sensor, and said obtaining the current battery temperature comprises:

and acquiring the temperature acquired by the temperature sensor, and determining the current battery temperature according to the temperature acquired by the temperature sensor.
The method of claim 1, wherein the current battery temperature comprises a battery surface temperature and/or a battery internal temperature.
A method of protecting a battery, the method comprising:

acquiring the current battery temperature;

determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery;

controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery.
The method of claim 23, wherein the predetermined multi-level battery protection strategy comprises at least one of:

controlling the battery to continue normal operation, reducing the discharging current of the battery, recording the current discharging temperature of the battery, locking the battery and displaying alarm information.
The method of claim 23, wherein the plurality of levels of battery temperature ranges comprise at least one of: the temperature sensor is used for detecting the temperature of the working fluid, and is characterized in that the temperature sensor is below a normal use temperature threshold, between the normal use temperature threshold and a limited use temperature threshold, between the limited use temperature threshold and a first life-affecting temperature threshold, and above a second life-affecting temperature threshold.
The method of claim 23, wherein controlling the battery to implement a battery protection strategy corresponding to the current battery temperature comprises:

and if the current battery temperature is below a normal use temperature threshold value, controlling the battery to continue normal operation.
The method of claim 23, wherein controlling the battery to implement a battery protection strategy corresponding to the current battery temperature comprises:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery.
The method of claim 27, further comprising:

and if the current battery temperature is higher than a second service life influence temperature threshold value, recording the current discharge temperature of the battery.
The method of claim 23, further comprising:

if the movable platform stops operating and the current temperature of the battery is above the second impact life temperature threshold, locking the battery to prohibit the battery from discharging and/or from obtaining charging.
The method of claim 29, further comprising:

and if the battery is locked, controlling the battery to discharge to a safe storage voltage for storage.
The method of claim 25, wherein the normal use temperature threshold comprises 65 ℃.
The method of claim 25, wherein the limited-use temperature threshold comprises 75 ℃.
The method of claim 25, wherein the first life-affecting temperature threshold comprises 85 ℃.
The method of claim 25, wherein the second life-affecting temperature threshold comprises 90 ℃.
The method of claim 23, wherein the battery is provided with a temperature sensor, and said obtaining the current battery temperature comprises:

and acquiring the temperature acquired by the temperature sensor, and determining the current battery temperature according to the temperature acquired by the temperature sensor.
The method of claim 23, wherein the current battery temperature comprises a battery surface temperature and/or a battery internal temperature.
A battery protection system, the system comprising: a memory and a processor;

the memory is used for storing a computer program;

the processor is configured to execute the computer program and, when executing the computer program, implement the steps of:

acquiring the current battery temperature;

determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform;

and controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to control the operation of the movable platform.
The system of claim 37, wherein the predetermined multi-level battery protection strategy comprises at least one of:

the method comprises the steps of controlling the battery to continue normal operation, reducing the discharging current of the battery, sending an instruction for indicating that the movable platform is prepared for return voyage before the battery stops operating, sending a prompt for suggesting return voyage of battery over-temperature use to a user, sending an instruction for controlling the movable platform to warn the user of return voyage, sending an instruction for suggesting return voyage of battery temperature serious warning to the user as soon as possible, recording the current discharging temperature of the battery, locking the battery, and displaying alarm information.
The system of claim 37, wherein the plurality of levels of battery temperature ranges comprise at least one of: the temperature sensor is used for detecting the temperature of the working fluid, and is characterized in that the temperature sensor is below a normal use temperature threshold, between the normal use temperature threshold and a limited use temperature threshold, between the limited use temperature threshold and a first life-affecting temperature threshold, and above a second life-affecting temperature threshold.
The system of claim 38, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is below a normal use temperature threshold value, controlling the battery to continue normal operation.
The system of claim 38, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the operation of the movable platform.
The system of claim 38, wherein the movable platform comprises an unmanned aerial vehicle;

the processor, when executing the computer program, implements the steps of:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to control the movable platform to carry out limited flight.
The system according to claim 42, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the flight attitude of the unmanned aerial vehicle.
The system according to claim 42, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery to limit the variable-speed flight of the unmanned aerial vehicle.
The system according to claim 42, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery so as to limit the flight altitude of the unmanned aerial vehicle.
The system of claim 38, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is between the limited service temperature threshold and the first life-influencing temperature threshold, sending an instruction for indicating the movable platform to carry out return preparation so as to control the movable platform to carry out return preparation.
The system according to claim 46, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is between the limited service temperature threshold and the first influence life temperature threshold, sending an instruction for indicating the movable platform to make return preparation so as to control the movable platform to make return preparation and send a prompt of battery over-temperature use suggestion return to the user.
The system of claim 38, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is higher than a second service life influencing temperature threshold value, sending an instruction for controlling the movable platform to warn the user to return, so as to control the movable platform to warn the user to return.
The system according to claim 48, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is higher than a second life-influencing temperature threshold value, sending an instruction for controlling the unmanned aerial vehicle to send a battery temperature serious warning suggestion to the user to return to the home as soon as possible so as to control the unmanned aerial vehicle to send a battery temperature serious warning suggestion to the user to return to the home as soon as possible.
The system according to claim 48, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is higher than a second service life influence temperature threshold value, recording the current discharge temperature of the battery.
The system according to claim 50, wherein the processor, when executing the computer program, performs the steps of:

if the movable platform stops operating and the current temperature of the battery is above the second life affecting temperature threshold, locking the battery to prohibit the battery from supplying power to the movable platform again and/or prohibit the battery from obtaining charging.
The system according to claim 51, wherein the processor, when executing the computer program, performs the steps of:

and if the battery is locked, controlling the battery to discharge to a safe storage voltage for storage.
The system of claim 39, wherein the normal use temperature threshold comprises 65 ℃.
The system of claim 39, wherein the limited-use temperature threshold comprises 75 ℃.
The system of claim 39, wherein the first life-affecting temperature threshold comprises 85 ℃.
The system of claim 39, wherein the second life-affecting temperature threshold comprises 90 ℃.
The system of claim 37, wherein the battery is provided with a temperature sensor, and the processor, when executing the computer program, performs the steps of:

and acquiring the temperature acquired by the temperature sensor, and determining the current battery temperature according to the temperature acquired by the temperature sensor.
The system of claim 37, wherein the current battery temperature comprises a battery surface temperature and/or a battery internal temperature.
A battery protection system, the system comprising: a memory and a processor;

the memory is used for storing a computer program;

the processor is configured to execute the computer program and, when executing the computer program, implement the steps of:

acquiring the current battery temperature;

determining a battery protection strategy corresponding to the current battery temperature according to the current battery temperature and a preset multi-level battery protection strategy, wherein the preset multi-level battery protection strategy corresponds to a plurality of levels of temperature ranges of the battery and is used for controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery;

controlling the battery to execute the battery protection strategy corresponding to the current battery temperature so as to realize safe use of the battery.
The system according to claim 59, wherein the predetermined multi-level battery protection strategy comprises at least one of:

controlling the battery to continue normal operation, reducing the discharging current of the battery, recording the current discharging temperature of the battery, locking the battery and displaying alarm information.
The system according to claim 59, wherein the plurality of levels of battery temperature ranges comprise at least one of: the temperature sensor is used for detecting the temperature of the working fluid, and is characterized in that the temperature sensor is below a normal use temperature threshold, between the normal use temperature threshold and a limited use temperature threshold, between the limited use temperature threshold and a first life-affecting temperature threshold, and above a second life-affecting temperature threshold.
The system according to claim 59, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is below a normal use temperature threshold value, controlling the battery to continue normal operation.
The system according to claim 59, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is between the normal use temperature threshold and the limited use temperature threshold, reducing the discharge current of the battery.
The system according to claim 63, wherein the processor, when executing the computer program, performs the steps of:

and if the current battery temperature is higher than a second service life influencing temperature threshold value, recording the current discharging temperature of the battery.
The system according to claim 59, wherein the processor, when executing the computer program, performs the steps of:

if the movable platform stops operating and the current temperature of the battery is above the second impact life temperature threshold, locking the battery to prohibit the battery from discharging and/or from obtaining charging.
The system according to claim 65, wherein the processor, when executing the computer program, performs the steps of:

and if the battery is locked, controlling the battery to discharge to a safe storage voltage for storage.
The system of claim 61, wherein the normal use temperature threshold comprises 65 ℃.
The system of claim 61, wherein the limited-use temperature threshold comprises 75 ℃.
The system of claim 61, wherein the first life-affecting temperature threshold comprises 85 ℃.
The system of claim 61, wherein the second life-affecting temperature threshold comprises 90 ℃.
The system of claim 59, wherein the battery is provided with a temperature sensor, and wherein the processor, when executing the computer program, performs the steps of:

and acquiring the temperature acquired by the temperature sensor, and determining the current battery temperature according to the temperature acquired by the temperature sensor.
The system of claim 59, wherein said current battery temperature comprises a battery surface temperature and/or a battery internal temperature.
A movable platform comprising a battery protection system as claimed in any one of claims 37-50, 52-58.
A battery comprising a battery protection system as claimed in any one of claims 37 to 58.
A battery comprising the battery protection system of any one of claims 59-72.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, causes the processor to implement the battery protection method according to any one of claims 1-22.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, causes the processor to implement the battery protection method according to any one of claims 23-36.