CN117121264A

CN117121264A - Battery control method, system, device, equipment and storage medium

Info

Publication number: CN117121264A
Application number: CN202280007994.2A
Authority: CN
Inventors: 黄珊; 黄磊磊; 梁旭; 李海力; 张世昌
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-11-24
Also published as: WO2024060012A1

Abstract

The embodiment of the application provides a battery control method, a system, a device, equipment and a storage medium, wherein the method comprises the following steps: and in the process of charging the battery, controlling the battery to discharge to an electric load in the electric equipment to which the battery belongs. In the application, in the process of charging the battery, a discharging loop is formed by the electric load in the electric equipment and the battery, and the electric quantity released by the battery in the discharging loop is used by the electric load. The battery is discharged by utilizing the electric load in the electric equipment to which the battery belongs, so that the battery charging device can be suitable for a charging scene in which the charging device does not have a discharging function, and the charging device with the discharging function does not need to be replaced under the charging scene, thereby saving the cost. And the hardware cost is not increased, and the effects of inhibiting lithium precipitation of the battery and improving the charging safety are realized when the battery is discharged in the charging process. Short-time discharging is also carried out under the condition that the full charge or the charging process of the battery is interrupted, so that the lithium precipitated in the charging process of the battery is reduced to the greatest extent, the safety of the battery is improved, and the service life of the battery is prolonged.

Description

Battery control method, system, device, equipment and storage medium

Technical Field

The present application relates to the field of battery technologies, and in particular, to a battery control method, system, device, apparatus, and storage medium.

Background

At present, the battery is widely applied to the fields of electric traffic, military equipment, aerospace and the like, the battery is often required to be charged in the use process of the battery, and lithium ions migrate from a positive electrode to a negative electrode in the charging process of the lithium ion battery. Along with the continuous progress of charging process, lithium ions gather at the negative electrode, and heavy current rapid charging makes lithium ions deposit and separate out at the negative electrode, produces electricity core lithium precipitation, shortens battery life, causes the safety problem even.

Disclosure of Invention

The embodiment of the application provides a battery control method, a system, a device, equipment and a storage medium, which are used for relieving the problem that lithium is separated from a negative electrode during battery charging.

In a first aspect, an embodiment of the present application provides a battery control method, including:

and in the process of charging the battery, controlling the battery to discharge to an electric load in the electric equipment to which the battery belongs.

In this embodiment, the battery is discharged during the charging of the battery, and a discharge loop is formed by the power load in the consumer and the battery during the discharging, in which the power released by the battery is used by the power load. The battery discharging is realized by utilizing the electric load in the electric equipment to which the battery belongs, the charging device is applicable to a charging scene in which the charging device does not have a discharging function, the charging device with the discharging function is not required to be replaced under the charging scene, and the cost can be saved. And the hardware cost of the BMS is not increased, and the effects of inhibiting lithium precipitation of the battery and improving the charging safety are realized when the battery is discharged in the charging process.

In some embodiments, the controlling the battery to discharge to an electrical load in the consumer to which it belongs includes:

and sending a pulse discharge instruction to electric equipment to which the battery belongs, wherein the pulse discharge instruction comprises preset discharge parameters.

In this embodiment, the battery management system only needs to send the preset discharging parameters to the electric equipment, and then selects the target electric load for receiving the discharging current of the battery by the electric equipment, so that the battery management system can realize discharging in the battery charging process through very simple operation, and the battery management system can be suitable for a charging scene that the charging equipment does not have a discharging function. Without increasing hardware costs. In the charging process, the battery is discharged, lithium precipitation of the battery is restrained, the safety of the battery is improved, and the service life of the battery is prolonged.

In some embodiments, controlling the discharge of the battery to an electrical load in the consumer to which it belongs comprises:

and receiving a discharge function starting notification returned by the electric equipment.

In this embodiment, the battery management system receives the discharge function start notification returned by the electric equipment, that is, the discharge can be started, and the battery management system can complete the discharge in the battery charging process by matching with the electric equipment through simple signal transmission and receiving operation, so that the battery management system can be suitable for a charging scene where the charging equipment does not have a discharge function. The method has the advantages of not increasing hardware cost, discharging the battery in the charging process, inhibiting lithium precipitation of the battery, improving the safety of the battery and prolonging the service life of the battery.

In some embodiments, the method further comprises:

starting timing while sending the pulse discharge instruction;

and controlling the battery to stop discharging when the preset condition is reached.

In the embodiment, the battery management system starts timing while sending the pulse discharge instruction, and stops discharging when the preset condition is reached, so that the electric equipment can be effectively prevented from being unresponsive for a long time, and the influence on the overall charging efficiency of the battery due to overlong single discharging time can be avoided.

In some embodiments, the preset conditions include: and the discharge time length when the discharge function starting notification is not received or the timing discharge time length reaches a preset time length threshold value.

In the embodiment, a discharging loop of the battery cannot be formed under the condition that the electric equipment does not respond, and the battery cannot be discharged, so that the discharging operation of the battery is stopped, and the situation that components in a circuit where the battery is located are damaged due to discharging under the condition that the electric equipment does not respond is avoided. The long-time waiting of the electric equipment under the condition of no response can be avoided, so that the whole charging process of the battery is prevented from being excessively long. Stopping discharging when the electric equipment responds and the preset duration threshold is actually discharged, avoiding the influence on the charging efficiency of the battery caused by overlong discharging time each time, and achieving the effects of inhibiting lithium precipitation of the battery through discharging and avoiding the overlarge influence on the overall charging efficiency of the battery.

stopping charging the battery;

and under the condition that the charging current is smaller than a preset current threshold value, sending a pulse discharging instruction to electric equipment to which the battery belongs.

In this embodiment, when it is detected that the charging current is smaller than the preset current threshold, the battery is considered to be actually stopped from being charged, and then a pulse discharging instruction is sent to the electric equipment. In this way, the battery can be prevented from being discharged under the condition that the battery is not stopped from being charged, and the battery is prevented from being damaged due to the fact that the battery is charged and discharged at the same time.

In some embodiments, controlling the battery to stop discharging includes:

and sending a pulse discharge ending instruction to the electric equipment.

In this embodiment, the battery management system can stop discharging only by sending a pulse discharge end instruction, and the operation is simple.

In some embodiments, controlling the battery to stop discharging includes:

a charge request is sent to the charging device, the charge current requested by the charge request being determined based on the current battery state.

In this embodiment, after stopping discharging in a case where the battery is in a charged state, the battery management system transmits a charge request to the charging device again, the charge current requested by the charge request being determined based on the present battery state. And the charging equipment resumes charging the battery after receiving the charging request. The battery management system determines whether to discharge again or not through the method provided by the embodiment of the application in the charging process, and the method is circularly executed in such a way, so that the short-time discharge is carried out for a plurality of times in the battery charging process, thereby inhibiting the lithium precipitation phenomenon in the charging process, realizing the healthy and quick charging of the battery, improving the charging safety and prolonging the service life of the battery.

In some embodiments, the battery discharges to an electrical load in the consumer to which it belongs upon determining that a preset discharge condition is satisfied.

In the embodiment, the discharging time is determined by judging whether the preset discharging condition is met or not in the battery charging process, and the battery is discharged to the electricity utilization load when the discharging time is reached, so that the discharging time can be accurately judged, short-time discharging is performed for a plurality of times, lithium precipitation generated in the battery charging process is reduced, the safety of battery charging is improved, healthy charging is realized, and the service life of the battery is prolonged.

In some embodiments, determining that the battery currently meets the preset discharge condition comprises:

acquiring the current state of the battery;

based on the state, it is determined whether the battery satisfies a preset discharge condition.

In this embodiment, it is determined whether the battery currently satisfies a preset discharge condition based on the state of the battery. The battery management system does not need to be changed in hardware, and whether the discharging time of the battery is reached or not can be automatically monitored only through software processing, so that the control of the discharging time is more accurate.

In some embodiments, the determining whether the battery satisfies a preset discharge condition based on the state includes:

When the state is a charging state, acquiring the current electrical parameters of the battery;

and determining whether the battery meets a preset discharging condition or not based on the electrical parameters.

In this embodiment, in the case where the battery is in a charged state, whether or not a discharge timing is reached is determined based on an electrical parameter of the battery such that the discharge timing is correlated with the electrical state of the battery. The discharge time is determined to be reached when the electrical parameters meet certain conditions in the charging process, so that the discharge is started when the lithium precipitation phenomenon possibly occurs in a period of time of charging, and the effect of inhibiting the lithium precipitation is achieved.

In some embodiments, the determining whether the battery satisfies a preset discharge condition based on the electrical parameter includes:

determining that the battery meets a preset discharge condition based on the electrical parameter being equal to a parameter threshold of a current discharge period; the electrical parameter includes at least one of a voltage, a state of charge, SOC, and a charge duration.

In this embodiment, the determination of the discharge timing based on the electrical parameter is related to the specific requirement for charging the battery, and if the charging period of the battery is emphasized more and is required to be as short as possible, the parameter threshold may be set to increase the short-time discharge for a small number of times during the entire charging process. If the charge safety of the battery is more important, the parameter threshold can be set, and a plurality of short-time discharges can be added after the whole charging process. Based on the electrical parameters and the parameter threshold value of each discharging period, the discharging scheme in the charging process is more in line with the requirements of the battery using scene.

In some embodiments, the determining whether the battery satisfies a preset discharge condition based on the state includes: and determining that the battery meets a preset discharging condition based on the state being a charging end state.

In this embodiment, the discharge timing is considered to be reached when the state of the battery is determined to be the charge end state, and the electrical parameter does not need to be determined. The method can realize short-time discharge of the battery under the condition of full charge or interruption of charge of the battery, so as to relieve the problem of lithium precipitation generated by recharging after the last short-time discharge in the battery charging process.

In a second aspect, an embodiment of the present application provides a battery control method, which is applied to an electric device, including:

and in the process of charging the battery of the electric equipment, controlling an electric load in the electric equipment to receive the discharging current of the battery.

In this embodiment, the battery is discharged for a short time during the battery charging process, and the amount of electricity discharged from the battery is received by the electricity consuming load. On the premise of not increasing the hardware cost of the BMS, the effects of inhibiting lithium precipitation of the battery and improving the charging safety are achieved. The battery is also subjected to short-time discharge at the end of charging, so that the battery can be subjected to short-time discharge even when the battery is fully charged or suddenly stops charging, and the safety of the battery is improved.

In some embodiments, the controlling the powered load in the powered device to receive the discharge current of the battery includes:

the battery management system corresponding to the battery is used for determining the working power of a target electricity load through communication;

and controlling the target electricity load to receive the discharging current of the battery at the working power.

In this embodiment, the electric consumer determines the discharge power according to the preset discharge parameter and the working power of the target electric load. The battery management system is simple to operate, excessive calculation is not needed by the battery management system, and the calculation resources of the battery management system are saved. The determined working power of the target electricity load can bear the required discharge power of the battery in the current discharge, the target electricity load operates with the determined working power in the battery discharge process, and the safety of the battery and the target electricity load in the discharge process can be improved.

In some embodiments, the battery management system communication corresponding to the battery determines a target electrical load and an operating power of the target electrical load, comprising:

receiving a pulse discharge instruction sent by a battery management system corresponding to the battery, wherein the pulse discharge instruction comprises preset discharge parameters;

And determining a target electricity load and corresponding working power of the target electricity load based on the preset discharge parameters.

In this embodiment, the target electrical load and the operating power of the target electrical load are determined by the electrical consumer. The battery management system is not required to perform excessive calculation, so that the calculation resources of the battery management system are saved, and the safety of the battery and the target electricity load in the discharging process can be improved.

In some embodiments, determining the target electrical load based on the preset discharge parameter comprises:

under the condition that the electric equipment is in a user use state, determining an electric load which is not used currently by a user in the electric equipment; selecting a target power utilization load from the power utilization loads which are not used currently based on the preset discharge parameters; or,

and under the condition that the electric equipment is in a non-user use state, selecting a target electric load from all electric loads of the electric equipment based on the preset discharge parameters.

In the embodiment, when the user using the electric equipment exists, the user is prioritized to use, and the target electric load for receiving the battery discharge is selected from the electric loads which are not used by the user, so that the normal use of the user is prevented from being influenced. When the user using the equipment does not exist, the target electricity load is selected from all the electricity loads, and then the battery is discharged through the target electricity load, so that on one hand, healthy charging of the battery is realized, and on the other hand, the electricity quantity released by the battery is used through the target electricity load, and the electricity quantity released by the battery is reasonably utilized.

In some embodiments, determining the respective operating powers of the target electrical loads based on the preset discharge parameters includes:

calculating the discharge demand power of the battery based on the current voltage of the battery and the demand discharge current included in the preset discharge parameters;

if the discharge required power is smaller than or equal to the rated power of the target electricity utilization load, determining the discharge required power as the working power of the target electricity utilization load;

and if the discharge required power is larger than the rated power of the target power utilization load, determining the rated power as the working power of the target power utilization load.

In the embodiment, the working power of the target electric load cannot exceed the discharge required power allowed by the battery, and the situation that the target electric load is damaged due to the operation exceeding the rated power can be reduced.

In some embodiments, controlling the target electrical load comprises:

and sending a discharging function starting notification to the battery management system.

In this embodiment, the powered device sends a discharge function on notification to the battery management system to inform the battery management system that the target powered load is ready to cause the battery management system to control the battery to begin discharging.

In some embodiments, the controlling the target electrical load to receive the discharge current of the battery at the operating power includes:

and controlling the target electricity load to start to operate at the working power.

In the embodiment, the electric equipment controls the target electric load to start to operate with the working power, so that the target electric load and the battery form a discharge loop, the electric equipment is used for realizing battery discharge, and the lithium precipitation problem generated in the battery charging process is effectively restrained.

in the case where there are a plurality of target electric loads, the amount of electric power discharged by the battery is distributed among the plurality of target electric loads based on a preset distribution ratio.

Under the application scene of a plurality of target electricity utilization loads, the electric quantity released by the battery is distributed among the plurality of target electricity utilization loads according to proportion, the electric quantity released by the battery can be used up as soon as possible, and the use of the electric quantity is more reasonable.

In a third aspect, an embodiment of the present application provides a battery control device, which is applied to a battery management system, including:

And the discharging module is used for controlling the battery to discharge to the electricity load in the electric equipment to which the battery belongs in the battery charging process.

In a fourth aspect, an embodiment of the present application provides a battery control device, which is applied to electric equipment, including:

and the load control module is used for controlling an electric load in the electric equipment to receive the discharge current of the battery in the battery charging process of the electric equipment.

In a fifth aspect, an embodiment of the present application provides a battery control system, including:

the battery management system is used for controlling the battery to discharge to an electricity load in the electric equipment to which the battery belongs in the battery charging process;

the electric equipment is used for controlling the electric load to receive the discharging current of the battery.

In a sixth aspect, an embodiment of the present application provides a computing device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the method according to the first or second aspect when executing the computer program.

In a seventh aspect, an embodiment of the present application provides a powered device, including the computing device of the sixth aspect.

In an eighth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program which, when executed by a processor, implements a method according to the first or second aspect.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

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

Fig. 1 is a flowchart of a battery control method according to an embodiment of the application.

Fig. 2 is another flow chart of a battery control method according to an embodiment of the application.

Fig. 3 is a schematic diagram of a battery control system according to an embodiment of the present application.

Fig. 4 is a schematic flow chart of controlling battery discharge at the BMS side in an electric vehicle;

fig. 5 is a schematic diagram of a flow of discharging a battery by a VCU-side control power load in an electric vehicle.

Fig. 6 is a graph showing the comparison between the range of the life of the battery of the healthy charging mode and the conventional charging mode according to the embodiment of the present application.

Fig. 7 is a schematic structural diagram of a battery control device according to an embodiment of the present application.

Fig. 8 is another schematic structural diagram of a battery control device according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a computing device according to an embodiment of the present application.

Detailed Description

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

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

Currently, batteries are widely used in various fields such as electric vehicles, military equipment, aerospace, and the like. In the use process of the battery, the battery is often required to be charged, and the lithium battery is widely used because of the characteristics of high charging density, long service life and the like. When a lithium battery is charged, lithium ions migrate from the positive electrode to the negative electrode. Along with the continuous progress of charging process, lithium ions gather at the negative electrode, and heavy current rapid charging makes lithium ions deposit and separate out at the negative electrode, produces electricity core lithium precipitation, shortens battery life, causes the safety problem even.

In order to inhibit the lithium precipitation phenomenon generated by charging a lithium battery and improve the safety of charging the lithium battery, the embodiment of the application provides a battery control method.

In the charging process, the battery is discharged for a short time, a discharging loop is formed by the electricity load in the electric equipment and the battery in the discharging process, and the electricity released by the battery in the discharging loop is used by the electricity load. The battery discharging is realized by utilizing the electric load in the electric equipment to which the battery belongs, the charging device is applicable to a charging scene in which the charging device does not have a discharging function, the charging device with the discharging function is not required to be replaced under the charging scene, and the cost can be saved. In addition, the method does not increase the hardware cost of the BMS (Battery Management System ), and the effect of inhibiting lithium precipitation of the battery and improving the charging safety is achieved by discharging the battery in the charging process. Short-time discharging is also carried out under the condition that the full charge or the charging process of the battery is interrupted, so that the lithium precipitated in the charging process of the battery is reduced to the greatest extent, the safety of the battery is improved, and the service life of the battery is prolonged.

The battery in the embodiment of the application can be various lithium batteries, such as a lithium cobalt oxide battery, a lithium manganate battery, a lithium iron phosphate battery, a lithium manganese iron phosphate battery and the like. The battery can be a single cell, a battery module or a battery pack. The electric equipment suitable for the method can be, but is not limited to, an electric toy with a battery, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like.

The electric equipment is provided with a battery, the battery discharges to provide power for the electric equipment, and the electric equipment is also provided with one or more electric loads, wherein the electric loads can comprise, but are not limited to, a thermal management system, a lighting system, a sound system, a fresh air system and the like. When the battery is insufficient in electric quantity, the battery needs to be charged, and lithium ions can be accumulated and separated out at the negative electrode in the battery charging process. Lithium evolution may also occur at the negative electrode of the battery in the event of full charge or sudden interruption of charge. Based on the above, the battery control method provided by the embodiment of the application can be used for carrying out one or more short-time discharge on the battery in the battery charging process, so that the problem of lithium precipitation of the battery caused by charging is inhibited, the safety of the battery is improved, and the service life of the battery is prolonged.

The embodiment of the application provides a battery control method, which specifically comprises the following steps:

and 101, in the process of charging the battery, controlling the battery to discharge to an electric load in the electric equipment to which the battery belongs.

The execution main body of the embodiment of the application is a battery management system, which can be a BMS (battery management system) or can be integrated with other controllers such as a whole vehicle controller, a motor controller and the like in electric equipment into a domain controller.

The battery can be a single battery core, a battery module formed by connecting a plurality of battery cores in series or in parallel, a battery pack formed by connecting a plurality of battery modules in series or in parallel, or a larger-scale battery pack formed by connecting a plurality of battery packs in series or in parallel, etc. The electric equipment is provided with a battery and at least one electric load.

Under the condition of low battery power, a user can connect the battery of the electric equipment with the charging equipment, and the battery is charged by the charging equipment. The charging device may be a charging peg, a charger or a charger, etc. For example, in the case where the electric device is an electric vehicle, the charging gun of the charging pile is inserted into the charging socket of the electric vehicle. And under the condition that the electric equipment is a mobile phone, the mobile phone is connected with the mains supply by using a mobile phone charger.

In the process of charging the battery, lithium ions migrate from the positive electrode to the negative electrode, accumulate at the negative electrode, and easily cause a problem of precipitation. Step 101, controlling the battery to discharge to the electricity load in the battery charging process, and forming a discharging loop by the electricity load and the battery, wherein the electricity released by the battery is used by the electricity load in the discharging loop. The battery discharging is realized by utilizing the electric load in the electric equipment to which the battery belongs, the charging device is applicable to a charging scene that the charging device does not have a discharging function, the discharging in the charging process of the battery can be realized without using the charging device with the discharging function, and the cost is saved. And the hardware cost of the battery management system is not increased, the effects of inhibiting lithium precipitation of the battery and improving the charging safety are realized when the battery is discharged in the charging process, the battery safety is increased, and the service life of the battery is prolonged.

Specifically, in the process of charging the battery, the battery management system sends a pulse discharging instruction to the electric equipment to which the battery belongs, wherein the pulse discharging instruction comprises preset discharging parameters. The preset discharge parameters may include a discharge time period, a required discharge current, a current voltage of the battery, and the like.

After the electric equipment receives the pulse discharging instruction, corresponding working power of the target electric load and the target electric load is determined according to preset discharging parameters, a discharging function starting notification is returned to the battery management system, and meanwhile the target electric load is controlled to start running at the working power. And the battery management system receives a discharge function starting notification returned by the electric equipment and starts discharging. Thus, the target electricity load and the battery form a discharging loop of the battery, and the electric quantity released by the battery is used by the target electricity load.

The battery management system only needs to send preset discharging parameters to the electric equipment, and the electric equipment selects a target electricity load for receiving the discharging current of the battery. When the battery management system receives a discharging function starting notification returned by the electric equipment, the battery starts to discharge, and the electric equipment control target electric load starts to operate with proper working power, so that discharging in the battery charging process can be realized, and the battery charging system can be suitable for a charging scene that the charging equipment does not have a discharging function. The battery management system only needs to send pulse discharge instructions and receive discharge function starting notification, and is simple to operate and free from increasing hardware cost. In the charging process, the battery is discharged, lithium precipitation of the battery is restrained, the safety of the battery is improved, and the service life of the battery is prolonged.

The battery management system starts timing when sending a pulse discharging instruction to the electric equipment, and controls the battery to stop discharging under the condition that the preset condition is reached. The preset condition includes that the discharge time length which does not receive the discharge function starting notification or the timing reaches a preset time length threshold value.

Specifically, the battery management system sends a pulse discharging instruction to the electric equipment, and starts timing at the same time, and if a discharging function starting notification returned by the electric equipment is not received when the timing duration reaches a certain duration, the preset condition is determined to be met, and the battery is controlled to stop discharging. The electric equipment does not respond within a certain period of time, a discharging loop of the battery cannot be formed under the condition, and the battery cannot be discharged, so that the discharging operation of the battery is stopped, and the situation that components in a circuit where the battery is located are damaged due to discharging under the condition that the electric equipment does not respond is avoided.

The certain time length can be 60s or 90s, and the like, and the electric equipment can control the battery to stop discharging without responding within a certain time length, and can also avoid long-time waiting under the condition that the electric equipment does not respond, thereby avoiding overlong whole charging process of the battery.

If the timing duration does not reach the certain duration, the power utilization function starting notification returned by the electric equipment is received, the battery management system controls the battery to start discharging, and the actual discharging duration is timed. And controlling the battery to stop discharging under the condition that the discharging time length reaches a preset time length threshold value. The preset duration threshold may be 20s or 25s, etc.

The method is characterized in that the method comprises the steps of stopping discharging when a preset duration threshold is actually discharged, avoiding the influence on the charging efficiency of the battery caused by overlong discharging time each time, and achieving the purposes of inhibiting lithium precipitation of the battery through discharging and avoiding the overlarge influence on the overall charging efficiency of the battery.

The specific mode of stopping discharging is that the battery management system sends a pulse discharging ending instruction to the electric equipment and stops discharging. And the electric equipment controls the target electric load to be closed after receiving the pulse discharge ending instruction. The battery management system can stop discharging only by sending a pulse discharging ending instruction, and the operation is simple.

In the case where the battery is in a charged state, after stopping discharging, the battery management system transmits a charge request to the charging device again, the charge current requested by the charge request being determined based on the present battery state. And the charging equipment resumes charging the battery after receiving the charging request. The battery management system determines whether to discharge again or not through the method provided by the embodiment of the application in the charging process, and the method is circularly executed in such a way, so that the short-time discharge is carried out for a plurality of times in the battery charging process, thereby inhibiting the lithium precipitation phenomenon in the charging process, realizing the healthy and quick charging of the battery, improving the charging safety and prolonging the service life of the battery.

And in the process of controlling the battery to discharge to the electricity load in the electric equipment to which the battery belongs, the battery is also stopped from being charged. And under the condition that the charging current is smaller than a preset current threshold value, sending a pulse discharging instruction to electric equipment to which the battery belongs.

Specifically, the battery management system transmits a suspend charge instruction to the charging device, which may be a charge request with a charge current of 0. And after receiving the charging suspension instruction, the charging equipment stops charging the battery. The charging device may have a response delay, which may result in an inability to immediately stop charging the battery. In view of this situation, after the battery management system sends the instruction to suspend charging, the charging current of the input battery can be monitored in real time, and under the condition that the charging current is monitored to be smaller than the preset current threshold value, the battery is considered to be actually stopped from being charged, and then the pulse discharging instruction is sent to the electric equipment. In this way, the battery can be prevented from being discharged under the condition that the battery is not stopped from being charged, and the battery is prevented from being damaged due to the fact that the battery is charged and discharged at the same time.

In the embodiment of the application, the battery discharges electricity to the electricity load in the electric equipment to which the battery belongs under the condition that the preset discharge condition is determined to be met. The battery discharge is controlled as shown in fig. 1, specifically by the operations of steps 1011 and 1012 as follows.

Step 1011: during the battery charging process, it is determined whether the battery currently satisfies a preset discharging condition.

When the battery of the electric equipment is connected with the charging equipment and the charging equipment starts to charge the battery, the battery management system can detect that the battery charging process starts, at the moment, the battery management system monitors the current state of the battery in real time, and whether the battery currently meets the preset discharging condition is determined based on the state of the battery.

The preset discharging condition is a condition which is required to be reached by discharging the battery in the charging process. The preset discharge condition is related to the state of the battery. The battery management system records a state flag bit of the battery, wherein the state flag bit has a plurality of possible values, and different values correspond to different states. The state of the battery may include a state of charge, an end of charge state, a stationary state, a power output state, and the like. For example, the state flag bit has a value of 001, indicating that the state of the battery is a charged state; the value of the status flag bit is 010, which indicates that the battery status is the charge end status. The value of the status flag and the corresponding status thereof are only taken as examples, and the value of the status flag bit and the status represented in the actual application may have other forms.

The battery management system reads the value of the state flag bit, determines the current state of the battery according to the value of the state flag bit, and further judges whether the battery currently meets the preset discharge condition or not based on the state of the battery. The battery management system does not need to be changed in hardware, and whether the discharging time of the battery is reached or not can be automatically monitored only through software processing, so that the control of the discharging time is more accurate.

In the embodiment of the present application, the preset discharging condition may specifically include that the battery is in a charging state and the electrical parameter is equal to a parameter threshold of the current discharging period, or that the battery is in a charging end state.

In some embodiments, the battery management system determines that the battery is in a charged state by reading the recorded state flag value. Alternatively, it is monitored that a connection is established with the charging device and the charging device begins to input charging current to the battery, at which point the battery management system determines that the battery is in a state of charge.

In the case of determining that the current state of the battery is the charged state, it is necessary to further combine the current electrical parameters of the battery to determine whether the discharge opportunity is reached. Specifically, current electrical parameters of the battery are acquired, and whether the battery meets preset discharge conditions is determined based on the acquired electrical parameters.

In the case of a battery in a charged state, it is determined whether a discharge opportunity is reached based on an electrical parameter of the battery such that the discharge opportunity is related to the electrical state of the battery. The discharge time is determined to be reached when the electrical parameters meet certain conditions in the charging process, so that the discharge is started when the lithium precipitation phenomenon possibly occurs in a period of time of charging, and the effect of inhibiting the lithium precipitation is achieved.

The electrical parameter includes at least one of a voltage, a state of charge SOC, and a charging duration, where the charging duration may be a duration of an interval between two adjacent discharging operations, or a duration from when the battery is connected to the charging device to charge to current accumulated charging. And determining that the battery meets the preset discharge condition based on the parameter threshold value of which the electrical parameter is equal to the current discharge period.

The parameter threshold value of the current discharging period comprises parameter threshold values corresponding to the electrical parameters such as voltage, state of charge (SOC) and charging duration. The determination of the discharge timing based on the electrical parameters is related to the specific need to charge the battery, and if the total charge duration of the battery is emphasized more and needs to be as short as possible, the parameter threshold can be set to increase short-time discharge for a small number of times in the whole charge process. If the charge safety of the battery is more important, the parameter threshold can be set, and a plurality of short-time discharges can be added after the whole charging process. Based on the electrical parameters and the parameter threshold value of each discharging period, the discharging scheme in the charging process is more in line with the requirements of the battery using scene.

In other embodiments, the battery management system determines that the battery satisfies the preset discharging condition by reading the value of the status flag bit if the current running state is determined to be the charging end state. The battery is in a charge end state when the charging gun is pulled out in the full charge or charging process of the battery.

When the state of the battery is determined to be the charge end state, the discharging time is considered to be reached, and the electrical parameter does not need to be judged. The method can realize short-time discharge of the battery under the condition of full charge or interruption of charge of the battery, so as to relieve the problem of lithium precipitation generated by recharging after the last short-time discharge in the battery charging process.

When it is determined that the battery currently satisfies the preset discharge condition through the operation of step 1011, the battery is controlled to be discharged for a short time through the operation of step 1012.

Step 1012, controlling the battery to discharge to the electricity load in the electric equipment to which the battery belongs.

The battery management system is communicated with electric equipment to which the battery belongs, and the electric equipment determines a target electric load and corresponding working power of the target electric load. And controlling the battery to discharge, and controlling the target electricity load by the electric equipment to start running with the determined working power in the discharging process of the battery, so that a discharging loop is formed between the battery and the target electricity load, and the battery discharges to the electricity load when the discharging time is reached, thereby inhibiting the lithium precipitation of the battery generated by charging the battery and improving the charging safety of the battery.

Specifically, the battery management system sends a pulse discharge instruction to the electric equipment, wherein the pulse discharge instruction comprises preset discharge parameters, and the preset discharge parameters can comprise discharge duration, required discharge current, current voltage of the battery and the like. And after the electric equipment receives the pulse discharge instruction, determining the target electric load and the working power of the target electric load based on preset discharge parameters.

The electric equipment calculates the discharge demand power of the battery based on the current voltage of the battery and the demand discharge current included in the preset discharge parameters. The product of the required discharge current and the current voltage of the battery is calculated, and the product is the discharge required power of the battery. And comparing the discharge required power with the rated power of the target electric load, and if the discharge required power is smaller than or equal to the rated power of the target electric load, determining the discharge required power as the working power of the target electric load, so that the working power of the target electric load cannot exceed the allowable discharge required power of the battery. And if the discharge demand power is larger than the rated power of the target electric load, determining the rated power of the target electric load as the working power of the target electric load, and reducing the occurrence of damage caused by the operation of the target electric load exceeding the rated power.

After the electric equipment determines the working power of the target electric load, a discharging function starting notification is sent to the battery management system, and the target electric load is controlled to start and operate according to the determined working power. And after receiving the discharge function starting notification, the battery management system controls the battery to start discharging.

The battery management system sends the preset discharge parameters to the electric equipment, and the electric equipment determines the discharge power according to the preset discharge parameters and the working power of the target electric load. The battery management system is simple to operate, excessive calculation is not needed by the battery management system, and the calculation resources of the battery management system are saved. The determined working power of the target electricity load can bear the required discharge power of the battery in the current discharge, the target electricity load operates with the determined working power in the battery discharge process, and the safety of the battery and the target electricity load in the discharge process can be improved.

In the embodiment of the application, the battery management system starts timing while sending the pulse discharging instruction to the electric equipment. And stopping the discharging operation when the timing time length reaches a certain time length and the discharging function starting notification returned by the electric equipment is not received, so that the influence on the total charging time length of the battery caused by the fact that the electric equipment does not respond for a long time is avoided.

And under the condition that the discharge function starting notification is received and the time is not overtime, controlling the discharge of the battery, timing the discharge time, and stopping the discharge operation when the discharge time reaches a preset time threshold. The lithium precipitation generated by the battery due to charging is reduced through discharging, and the discharging time does not exceed a preset time threshold, so that the influence on the total charging time and the charging efficiency of the battery due to overlong discharging time is avoided.

In the embodiment of the application, if the battery is in the charging state currently, a charging suspension instruction is also required to be sent to the charging equipment. After the charging equipment pauses to charge the battery, the battery management system discharges to the target electricity utilization load, so that the battery is prevented from being damaged due to the collision between the charging current and the discharging current caused by the charging current input into the battery and the discharging current output from the battery.

In order to further determine that the charging equipment stops charging the battery, after sending a charging suspension instruction to the charging equipment, the charging equipment detects the charging current of the battery input by the charging equipment, and under the condition that the charging current is smaller than a preset current threshold value, the battery is controlled to discharge, so that the battery is prevented from being charged and discharged at the same time, and the safety of battery discharge is further improved. The preset current threshold may be 50A or 55A, etc.

In the embodiment of the application, if the battery is currently in a charging state, the charging needs to be performed again after stopping the discharging operation, and at this time, a charging request is sent to the charging device based on a preset charging map table preset in the battery management system. The preset charging map table comprises mapping relations of information such as SOC, battery voltage, battery temperature, charging multiplying power and the like. The battery management system obtains corresponding charging multiplying power from a preset charging map table based on the current SOC of the battery, the voltage of the battery, the temperature of the battery and the like, and sends a charging request to the charging equipment, wherein the charging request comprises a charging request current corresponding to the charging multiplying power. And after receiving the charging request, the charging equipment charges the battery according to the charging request current. And determining whether the battery meets the preset discharging condition again in the charging process, and controlling the battery to discharge again under the condition that the battery meets the preset discharging condition. And (3) circularly judging the discharge time in the whole battery charging process, and controlling the battery to discharge for a short time when the discharge time is reached.

Therefore, the lithium separation generated in the battery charging process can be reduced, the safety of battery charging is improved, healthy charging is realized, and the service life of the battery is prolonged. Under the condition that the battery is fully charged or a user pulls out the charging gun halfway to finish the charging process, short-time discharging is performed again, lithium precipitation generated in the last period of the charging process is reduced, lithium precipitation in the whole charging process is reduced as much as possible, the charging safety of the battery is improved, and the service life of the battery is prolonged.

In the embodiment of the application, in the charging process, the battery is used for carrying out short-time discharging to the electricity utilization load in the electric equipment, so that the lithium back intercalation caused by charging is promoted, the purpose of realizing the discharging of the battery by utilizing the electricity utilization load is realized, and the method can be applied to a charging scene that the charging equipment does not have a discharging function. And the hardware cost of the BMS is not required to be increased, the lithium precipitation amount generated by battery charging is reduced, and the effects of inhibiting lithium precipitation of the battery and improving the charging safety are realized. Under the condition of full charge or interruption of charging, the battery is also discharged for a short time, lithium precipitated in the whole charging process is reduced to the greatest extent, the safety of the battery is improved, and the service life of the battery is prolonged.

The embodiment of the application also provides a battery control method which is applied to the electric equipment, and further the method can be executed by a controller in the electric equipment, wherein the controller can be a VCU (Vehicle control unit, vehicle controller) or a domain controller integrating the functions of a battery management system and the VCU. The method specifically comprises the following steps:

step 201: in the battery charging process of the electric equipment, an electric load in the electric equipment is controlled to receive the discharging current of the battery.

The preset discharging condition includes that the battery is in a charging state and the electrical parameter is equal to a parameter threshold of the current discharging period, or the preset discharging condition includes that the battery is in a charging end state. And discharging the battery for a short time in the charging process, and receiving the electric quantity released by the battery through an electric load. The discharging loop between the electricity load and the battery is formed, short-time discharging in the battery charging process can be realized by using the electricity load, and the discharging loop is suitable for application scenes in which the charging equipment does not have a discharging function. On the premise of not increasing the hardware cost of the BMS, the effects of inhibiting lithium precipitation of the battery and improving the charging safety are achieved. The battery is also subjected to short-time discharge at the end of charging, so that the battery can be subjected to short-time discharge even when the battery is fully charged or suddenly stops charging, and the safety of the battery is improved.

As shown in fig. 2 in particular, the discharge process is achieved by the operation of steps 2011 and 2012 as follows:

step 2011: and the electric equipment is communicated with a battery management system corresponding to the battery to determine the working power of the target electric load.

In one implementation, the electric device receives a pulse discharge instruction sent by a battery management system corresponding to a battery, wherein the pulse discharge instruction comprises preset discharge parameters, and the preset discharge parameters comprise discharge duration, required discharge current, current voltage of the battery and the like. And determining the target electricity load and the corresponding working power of the target electricity load based on the preset discharge parameter. And sends a discharge function on notification to the battery management system.

And determining the target electricity load, wherein the electricity utilization equipment is determined based on the current state of the electricity utilization equipment and preset discharge parameters. The current state of the powered device includes whether there is a user using the powered device, an external temperature of the powered device, an internal temperature, etc. The electric equipment detects whether a user using the electric equipment exists currently through equipment such as a camera or an infrared sensor, and detects the external temperature and the internal temperature of the electric equipment through a temperature sensor.

If the user using the electric equipment exists currently, the working state of the electric load used by the user is not changed, and the influence on the use of the user is avoided. In this case, the electric device determines an electric load that is not currently used by the user in the electric device, and selects a target electric load from the electric loads that are not currently used based on the preset discharge parameter. If it is detected that no user using the electric equipment exists currently, the electric equipment selects a target electric load from all electric loads of the electric equipment based on preset discharge parameters.

The electric equipment can calculate the required discharge power of the battery based on the required discharge electric quantity and the current voltage of the battery, which are included in the preset discharge parameters. And then selecting a target electric load and determining the corresponding working power of the target electric load based on the required discharge power of the battery and the rated power of each electric load. One or more target electric loads can be selected, the working power of each target electric load is determined to be smaller than or equal to the rated power of each target electric load, and the sum of the working powers of all the selected target electric loads is smaller than or equal to the required discharge power of the battery.

According to the embodiment of the application, the target electricity load capable of receiving the discharge of the battery can be preconfigured in the electric equipment. For example, taking an electric automobile as an example, a thermal management system may be preconfigured in a vehicle controller of the electric automobile as a target electric load, or a thermal management system and an air conditioner may be selected as target electric loads when no person is in the vehicle.

When the user using the electric equipment exists, the user is prioritized to use, and the target electric load for receiving the battery discharge is selected from the unused electric loads of the user, so that the normal use of the user is prevented from being influenced. When the user using the equipment does not exist, the target electricity load is selected from all the electricity loads, and then the battery is discharged through the target electricity load, so that on one hand, healthy charging of the battery is realized, and on the other hand, the electricity quantity released by the battery is used through the target electricity load, and the electricity quantity released by the battery is reasonably utilized.

After the target electricity load is determined in the mode, the electric equipment calculates the discharge demand power of the battery based on the current voltage of the battery and the demand discharge current included in the preset discharge parameters. The product of the required discharge current and the current voltage of the battery is calculated, and the product is the discharge required power of the battery. The discharge demand power is compared with the operating power of the target electrical load. If a plurality of target electric loads are determined, the working power of the target electric loads is the sum of the working powers of the target electric loads.

If the discharge demand power is smaller than or equal to the working power of the target electricity load, the discharge demand power is determined to be the discharge power of the battery, so that the discharge power cannot exceed the allowable discharge demand power of the battery, and the influence on the total charging duration and the charging efficiency of the battery due to the overlarge discharge power is avoided. If the discharge demand power is larger than the working power of the target electricity utilization load, the working power of the target electricity utilization load is determined to be the discharge power of the battery, so that the discharge power does not exceed the maximum power bearable by the target electricity utilization load, and the condition that the target electricity utilization load is damaged due to overlarge discharge power of the battery is reduced.

And determining a target electricity load by the electric equipment, and determining the working power of the target electricity load according to the preset discharge parameter and the rated power of the target electricity load. The battery management system is not required to perform excessive calculation, so that the calculation resources of the battery management system are saved, and the safety of the battery and the target electricity load in the discharging process can be improved.

Step 2012: and the electric equipment control target electric load receives the discharge current of the battery by the working power.

After the electric equipment and the battery management system are communicated to determine the target electric load and the working power of the target electric load, a discharging function starting notification is sent to the battery management system, and the target electric load is controlled to start running at the working power. The battery management system receives the notification, controls the battery to start discharging, and starts timing. The electric equipment controls the target electric load to be started, and the electric quantity discharged by the battery is utilized for working. And when the timed duration reaches a preset duration threshold, the battery management system controls the battery to stop discharging and sends a pulse discharging ending instruction to the electric equipment.

And if the plurality of target electricity utilization loads exist, the electric equipment distributes the electric quantity discharged by the battery among the plurality of target electricity utilization loads based on the preset distribution proportion.

The preset dispensing ratio may be 1:1, 2:3, etc. The embodiment of the application does not limit the specific value of the preset distribution proportion, and can be set according to the requirement in practical application. Under the application scene of a plurality of target electricity utilization loads, the electric quantity released by the battery is distributed among the plurality of target electricity utilization loads according to proportion, the electric quantity released by the battery can be used up as soon as possible, and the use of the electric quantity is more reasonable.

The electric equipment is communicated with the battery management system, the electric equipment determines the target electric load and the working power of the target electric load, and the target electric load is controlled to receive the discharging current of the battery with the working power. The method has the advantages that short-time discharge of the battery is received by the target electricity load in the battery charging process or at the end of the battery charging process, and the effects of inhibiting lithium precipitation of the battery and improving the charging safety are achieved on the premise of not increasing the hardware cost of the equipment.

The embodiment of the application also provides a battery control system, which comprises a battery management system and electric equipment, and referring to fig. 3.

The battery management system is used for controlling the battery to discharge to the electricity load in the electric equipment to which the battery belongs in the battery charging process;

and the electric equipment is used for controlling the electric load to receive the discharge current of the battery.

In the embodiment of the application, during the charging process of the battery or when the charging is finished, the battery is used for discharging electricity to the electricity load in the electric equipment for a short time, and the effects of inhibiting the lithium precipitation of the battery and improving the charging safety are realized on the premise of not increasing the hardware cost of the BMS. The battery is also subjected to short-time discharge at the end of charging, so that the battery can be subjected to short-time discharge even when the battery is fully charged or suddenly stops charging, and the safety of the battery is improved.

In order to facilitate understanding of the battery control method provided by the embodiment of the present application, an electric vehicle is described below as an example. As shown in fig. 4, S1: the BMS detects whether the whole vehicle is in a charged state, and if so, performs step S2, and if not, performs step S10. S2: the BMS judges whether to trigger the pulse discharge condition based on the electrical parameters of the battery, if yes, the step S3 is executed, and if not, the step S1 is returned. S3: the BMS transmits a charging request of which the charging current is 0 to the charging post. S4: the BMS collects the magnitude of charging current input by the charging pile into the battery. S5: the BMS judges whether the charging current input by the charging pile is smaller than a preset current threshold value, if so, the step S6 is executed, and otherwise, the step S4 is returned. S6: the BMS sends a pulse discharging instruction to the whole vehicle controller VCU and starts timing. S7: the BMS determines whether a discharge function start notification returned from the VCU is received before the timing duration reaches a certain duration, if so, performs step S8, otherwise, performs step S9. S8: the BMS controls the battery to start discharging, counts the discharging time, and stops discharging when the discharging time reaches a preset time threshold. S9: the BMS transmits a charging request to the charging stake based on the preset charging map table, and then returns to step S1 to be cyclically executed. S10: the BMS determines whether it is currently in a charge end state, and if so, performs step S11, otherwise, ends. S11: the BMS sends a pulse discharging instruction to the whole vehicle controller VCU and starts timing. S12: the BMS determines whether a discharge function start notification returned from the VCU is received before the timing duration reaches a certain duration, and if so, performs step S13, otherwise, performs step S14. S13: and the BMS controls the battery to start discharging, stops discharging when the discharging time reaches a preset time threshold value, and ends.

Fig. 5 shows a control process of the vehicle control unit VCU side, as shown in fig. 5, A1: the VCU receives a pulse discharge command sent by the BMS, wherein the pulse discharge command comprises preset discharge parameters. A2: the VCU detects whether a person exists in the vehicle, if so, the step A3 is executed, otherwise, the step A5 is executed. A3: the VCU determines the working power of the thermal management system based on the preset discharge parameters, controls the thermal management system to start running at the working power, and sends a discharge function starting notification to the BMS. A4: the VCU turns off the thermal management system when receiving a discharge end command transmitted from the BMS. A5: the VCU determines the working power of the thermal management system and the air conditioner based on the preset discharge parameters and the preset distribution ratio, starts the thermal management system based on the determined working power, starts the air conditioner according to the outside temperature and the inside temperature, and sends a discharge function starting notification to the BMS. A6: the VCU turns off the thermal management system and the air conditioner when receiving a discharge end command transmitted from the BMS.

The battery control method provided by the embodiment of the application is used for charging the battery, so that the service life of the battery can be greatly prolonged, and the cycle number of the battery can be increased. Fig. 6 shows the effect of healthy charging of a battery using the method of the embodiment of the present application, the magnitude of improvement in battery life by healthy charging being compared with the effect of battery life by conventional charging. As can be seen from fig. 6, compared with the conventional charging mode, the healthy charging mode provided by the embodiment of the application can prolong the service life of the battery by 10%. The conventional charging mode may be a mode of rapidly charging the battery with a large current.

In the battery charging process of the electric automobile, the BMS judges whether to trigger a pulse discharging condition based on the electrical parameters of the battery, and when the pulse discharging condition is triggered, the BMS requests the charging pile to stop charging and discharge the electric pile to the thermal management system, or the thermal management system and the air conditioner simultaneously receive battery discharging, and lithium back intercalation due to charging is promoted through discharging. On the premise of not increasing the hardware cost of the BMS, the lithium precipitation amount generated by battery charging is reduced, and the effects of inhibiting lithium precipitation of the battery and improving the charging safety are realized. When the battery is in a charging end state, the battery is also controlled to discharge to the thermal management system or the air conditioner for a short time, so that the precipitated lithium in the whole charging process is reduced to the greatest extent, the safety of the battery is improved, and the service life of the battery is prolonged. .

An embodiment of the present application further provides a battery control device, where the device is configured to perform an operation of a battery management system in the battery control method provided in the foregoing embodiments, as shown in fig. 7, and the device includes:

the discharging module 301 is configured to control the battery to discharge to an electrical load in the consumer to which the battery belongs during the charging process of the battery.

The discharging module 301 is configured to send a pulse discharging instruction to the electric device to which the battery belongs, where the pulse discharging instruction includes a preset discharging parameter.

The discharging module 301 is configured to receive a discharging function start notification returned by the electric device.

The discharging module 301 is further configured to start timing while sending a pulse discharging instruction; and controlling the battery to stop discharging when the preset condition is reached. The preset conditions comprise: the discharge time length when the discharge function starting notice or the timing is not received reaches a preset time length threshold value.

A discharging module 301 for stopping charging the battery; and under the condition that the charging current is smaller than a preset current threshold value, sending a pulse discharging instruction to electric equipment to which the battery belongs.

The discharging module 301 is configured to send a pulse discharging end instruction to the electric device.

The discharging module 301 is configured to send a charging request to the charging device, where a charging current requested by the charging request is determined based on the current battery state.

And the discharging module 301 is configured to discharge the battery to an electric load in the electric equipment to which the battery belongs, if the preset discharging condition is determined to be satisfied.

A discharging module 301, configured to obtain a current state of the battery; based on the state, it is determined whether the battery satisfies a preset discharge condition.

The discharging module 301 is configured to obtain a current electrical parameter of the battery when the current state of the battery is a charging state; based on the electrical parameters, it is determined whether the battery satisfies a preset discharge condition.

The discharging module 301 is configured to determine that the battery meets a preset discharging condition based on a parameter threshold value of which an electrical parameter is equal to a current discharging period; the electrical parameter includes at least one of a voltage, a state of charge, SOC, and a charge duration.

The discharging module 301 is configured to determine that the battery meets a preset discharging condition based on the state being a charging end state.

The battery control device provided by the above embodiment of the present application has the same advantages as the method adopted, operated or implemented by the application program stored therein, because of the same inventive concept as the battery control method provided by the embodiment of the present application.

The embodiment of the application also provides a battery control device, which is used for executing the operation of the electric equipment in the battery control method provided by the above embodiments, as shown in fig. 8, and the device comprises:

the load control module 401 is configured to control an electric load in the electric device to receive a discharge current of the battery during a battery charging process of the electric device.

The load control module 401 is configured to determine a target power consumption load and a working power of the target power consumption load through communication with a battery management system corresponding to the battery; the control target electrical load receives a discharge current of the battery at an operating power.

The load control module 401 is configured to receive a pulse discharge instruction sent by a battery management system corresponding to a battery, where the pulse discharge instruction includes a preset discharge parameter; and determining a target electricity load and corresponding working power of the target electricity load based on the preset discharge parameters.

The load control module 401 is configured to determine an electrical load that is not currently used by a user in the electrical device when the electrical device is in a user use state; selecting a target power utilization load from power utilization loads which are not used currently based on preset discharge parameters; or under the condition that the electric equipment is in a non-user use state, selecting a target electric load from all electric loads of the electric equipment based on the preset discharge parameters.

The load control module 401 is configured to calculate a discharge demand power of the battery based on a current voltage of the battery and a required discharge current included in a preset discharge parameter; if the discharge demand power is smaller than or equal to the rated power of the target electricity utilization load, determining the discharge demand power as the working power of the target electricity utilization load; and if the discharge required power is larger than the rated power of the target electric load, determining the rated power as the working power of the target electric load.

The load control module 401 is configured to send a discharge function start notification to the battery management system.

The load control module 401 is configured to control the target electricity load to start running at the working power.

The load control module 401 is configured to, in a case where there are a plurality of target electric loads, distribute the amount of electric power discharged from the battery among the plurality of target electric loads based on a preset distribution ratio.

Fig. 9 shows a schematic block diagram of a computing device 700, which may be a BMS, a VCU, a domain controller, or the like, in accordance with an embodiment of the present application. As shown in fig. 9, the computing device 700 includes a processor 710, and optionally the computing device 700 further includes a memory 720, wherein the memory 720 is used for storing a computer program, and the processor 710 is used for reading the computer program and executing the battery control method of the foregoing embodiments of the present application based on the computer program.

In some embodiments, the processor 710 executing the program may be built in the BMS to determine that the battery currently satisfies a preset discharging condition during or after charging the battery, and control the battery to discharge to an electric load in the consumer to which the battery belongs.

In other embodiments, the processor 710 for executing the program may be built in the vehicle controller VCU to control the power load in the power consumer to receive the discharge current of the battery during or after the battery of the power consumer is charged and the battery meets the preset discharge condition.

In still other embodiments, the processor 710 executing the program may be further built in the domain controller to determine that the battery currently meets a preset discharging condition during or after charging, control the battery to discharge to an electric load in the electric device to which the battery belongs, and control the electric load in the electric device to receive the discharging current of the battery.

The embodiment of the application also provides electric equipment which comprises the computing equipment, and the electric equipment can be an electric vehicle, an electric aircraft, an electric toy and the like.

The embodiments of the present application also provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the methods of the various embodiments of the present application described above.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within 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

1. A battery control method, applied to a battery management system, comprising:

2. The method of claim 1, wherein the controlling the battery to discharge to an electrical load in the consumer to which it belongs comprises:

3. The method according to claim 1 or 2, wherein controlling the discharge of the battery to the electrical load in the consumer to which it belongs comprises:

4. A method according to claim 2 or 3, characterized in that the method further comprises:

starting timing while sending the pulse discharge instruction;

5. The method of claim 4, wherein the preset conditions include: and the discharge time length when the discharge function starting notification is not received or the timing discharge time length reaches a preset time length threshold value.

6. The method of any of claims 1-5, wherein the controlling the discharge of the battery to the powered load in the powered device to which it belongs comprises:

stopping charging the battery;

7. The method of claim 4, wherein controlling the battery to stop discharging comprises:

and sending a pulse discharge ending instruction to the electric equipment.

8. The method of claim 7, wherein controlling the battery to stop discharging comprises:

9. The method according to any of the claims 1-8, wherein the battery discharges to an electrical load in the consumer to which it belongs upon determining that a preset discharge condition is met.

10. The method of claim 9, wherein determining that the battery currently meets the preset discharge condition comprises:

acquiring the current state of the battery;

11. The method of claim 10, wherein the determining whether the battery satisfies a preset discharge condition based on the state comprises:

12. The method of claim 11, wherein determining whether the battery satisfies a preset discharge condition based on the electrical parameter comprises:

13. The method of claim 10, wherein the determining whether the battery satisfies a preset discharge condition based on the state comprises:

and determining that the battery meets a preset discharging condition based on the state being a charging end state.

14. A battery control method, applied to a powered device, comprising:

15. The method of claim 14, wherein the controlling the powered load in the powered device to receive the discharge current of the battery comprises:

16. The method of claim 15, wherein the battery management system communication corresponding to the battery determines a target electrical load and an operating power of the target electrical load, comprising:

17. The method of claim 16, wherein determining a target electrical load based on the preset discharge parameter comprises:

18. The method according to claim 16 or 17, wherein determining the respective operating power of the target electrical load based on the preset discharge parameter comprises:

19. The method of any one of claims 15-18, wherein controlling the target electrical load comprises:

20. The method of any one of claims 15-19, wherein the controlling the target electrical load to receive the discharge current of the battery at the operating power comprises:

21. The method of any one of claims 15-20, wherein the controlling the target electrical load to receive the discharge current of the battery at the operating power comprises:

22. A battery control apparatus, characterized by being applied to a battery management system, comprising:

23. A battery control device, characterized by being applied to electric equipment, comprising:

24. A battery control system, comprising:

25. A computing device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method of any of claims 1-21 when the computer program is executed by the processor.

26. A powered device comprising a battery, an electrical load, and the computing device of claim 25.

27. A computer readable storage medium storing a computer program, which when executed by a processor, implements the method of any one of claims 1-21.

28. A computer program product comprising a computer program, characterized in that the computer program is executed by a processor to implement the method of any of claims 1-21.